The dermis is the layer of skin between the epidermis (stratified squamous keratinized epithelium) and the subcutaneous tissue. The stroma is the connective tissue and the associated blood vessels and nerves which pass through it. found in immediately deep to the skin Dense Connective Tissue. This image is from palmar skin (skin from the palm of the hand), and the dense irregular connective tissue is stained light brown. The areolar tissue is also dense with collagen fibers, which makes it strong and rigid. fibroblast EM9. They are somewhat less flexible than loose connective tissue. Dense regular connective tissue makes up tendons and ligaments. Dense Connective Tissue. Dense irregular connective tissues are also present in the sclera and within deeper layers of the skin. On the basis of the arrangement of collagen fibres, they are divided into two types: Dense irregular connective tissue can be found in the white of the eye. Dense connective tissue Dense regular tissue:- consist of collagen fibers regularly arranged in bundle and the matrix present is shiny white and fibroblasts are also present. 3. Know the structure, function, and location of: adipose tissue, mixed adipose tissue, white areolar (loose) connective tissue collagen fiber collagen fibril connective tissue, dense irregular For example, ligaments are the type of dense connective tissue that connect bones together. Dense irregular connective tissue also has low vascularity and water content, resulting in slow diffusion of nutrients and slower healing times. The cells sit in a matrix made up of glycoproteins, fibrous proteins and glycosoaminoglycans , which have been secreted by the fibroblasts, and the major component of the matrix, is in fact, water. The specialized type of connective tissue consists of fat or lipid cells called adipocytes. Connective Tissue Proper . Lab 5 . Figure 4: Dense regular tissue. Connective tissue, as the name implies, is a term given to several different tissues of the body that serve to connect, support and help bind other tissues in the body. Dense connective tissue, also called dense fibrous tissue, is a type of connective tissue with fibers as its main matrix element. Dense connective tissues primarily stabilize and support surrounding tissues and organs. Connective tissues can have various levels of vascularity. Whereas, dense connective tissue is less abundant, and it consists of many fibres in the matrix. fibroblast EM9. Know the structure, function, and location of: adipose tissue, mixed adipose tissue, white areolar (loose) connective tissue collagen fiber collagen fibril connective tissue, dense irregular Functions of Connective Tissues. This tissue is of the following types: a) Skeletal Tissues. Loose irregular connective tissue includes, but is not limited to, the superficial fascial sheath of the body directly under the skin, the muscle and nerve sheaths, and the bed and framework of the . 1. Tendons transmit forces generated by muscles to move joints. Dense Irregular Connective Tissue. In a healthy person, 20 to 25% of total body weight is composed of . the deep portion of the dermis, around cartilage, around bone, it also forms a thick fibrous capsule that supports and houses internal organs, such as the liver, kidney, and spleen. Dense Irregular Connective Tissue Function Dense irregular tissue functions mainly in providing structural support and strength against forces applied from multiple directions (it increases the tensile strength of the tissue in which it is found). Dense irregular connective tissue is found prominently in the dermis of the skin and the lamina propria of the gastrointestinal tract. Lots of collagen fibres that are parallel to one another and are packed tightly. The ground substance is responsible for the adhesion function of the connective tissue. Give some examples of where dense irregular connective tissue is found in the body. #1. Identify the tissue type and its function. Cartilage is avascular, while dense connective tissue is poorly vascularized. Connective tissue proper: dense connective tissue, dense irregular Figure 4.8e Connective tissues. Dense irregular . Examples: connective tissue of peritoneum, connective tissue of fibrous pericardium. Due to high portions of collagenous fibers, dense irregular connective tissue provides strength, making the skin resistant to tearing by stretching forces from different directions. For example, tendons are made of dense regular connective tissue. It is also in the sclera and in the deeper skin layers. Function of Connective Tissue. Protection is another major function of connective tissue . Adipose Connective Tissue. Dense Connective Tissue: Dense regular connective tissue. Term information-. their functions. plasma cell EM26. Function Loose Connective Tissue: The major function of the loose connective tissue is to serve as a supporting matrix for the blood vessels, lymphatic vessels, nerves, muscle fibers, organs, and the skin. Where is the dense irregular connective tissue found? Unformatted text preview: UNIT 4: Animal Tissues Major Types: Epithelial Tissues Connective Tissues Muscular Tissues Nervous Tissues Prepared by: Beverly F. Basalo, M.Sc. Mesenchyme. They, along with adipose tissues, form the subcutaneous layer beneath the skin, which connects muscles and other structures to the skin. Description: This is a section of collagenous connective tissue from the reticular layer of the dermis. A. Loose connective tissue is the most abundant type. Collagen, one of three fiber types in connective tissue, is primarily responsible for the strength and resistance to tension found in dense irregular connective tissue (Delforge, 2002). Dense regular connective tissue (DRCT) is divided into white fibrous connective tissue and yellow fibrous connective tissue, both of which occur in two forms: cord arrangement and sheath arrangement. macrophage and eosinophil EM10. Dense regular connective tissue is found in tendons and ligaments. Elastic . This is These injuries typically result from a sharp cut or crush injury but can occasionally occur as closed injuries. Dense irregular connective tissue is found in high concentrations in body parts where support is needed to prevent the effects of forces that pull in multiple directions. reticular. The dermis provides tensile strength and elasticity to skin. As a consequence, it displays greater resistance to stretching and a higher tensile strength. Dense connective tissue is divided into 1) dense regular, 2) dense irregular, 3) elastic. Loose connective tissue works to hold organs in place and is made up of . 3. Loose connective tissues can be found all over the body, providing both support and elasticity. General connective tissue is either loose, or dense, depending on the arrangement of the fibres. The collagen fibers in dense regular connective tissue are bundled in a parallel fashion. Areolar Connective Tissue. Connective tissue can further be broken down into three categories: loose connective tissue, dense connective tissue, and specialized connective tissue. Function: Withstands tension exerted in many directions; provides structural strength. Loose arrangement of fibres (collagen, elastin, reticular), cells (fibroblasts, macrophages lymphocytes etc.) The ground substance also served as a molecular sieve that can travel between blood capillaries and the cells, thus helping is the movement of nutrients, oxygen, and waste materials between the two. Contains mast cells that help prevent infection. This layer is characterized by thick bundles of collagen that are organized in various directions within the tissue. Histology Study of tissues (groups of cells that are similar in structure and function) 4 Tissue Types Epithelial Tissue Interface tissue that forms boundaries between environments and lines surfaces "epithe-" means . Loose Connective Tissue B. . Thus, a form of connective tissue exists to accommodate such a requirement, known as dense irregular connective tissue (Delforge, 2002). Dense irregular connective tissue, which is made up of elastic fibers and a type of protein fiber called collagen, provides protection to the tissues or organs it surrounds. A. They are mostly located in the dermis layer of the skin, capsules around the spleen and liver as well as other organs in the body. IV. Their main function is to support and transmit mechanical forces. Connective tissue proper: dense connective tissue, dense irregular Description: Primarily irregularly arranged collagen fibers; some elastic fibers; fibroblast is the major cell type. In the dense connective tissue, fibroblast cells and fibres are compactly packed. Show irregular . Functions of the areolar connective tissue include: Provides a protective framework that keeps major structures in place and offers support. Major functions of connective tissue include: 1) binding and supporting, 2) protecting, 3) insulating, 4) storing reserve fuel, and 5) transporting substances within the body. Keywords. Connective tissues help and connect the body's various tissues and organs. Mechanical support - stroma below epithelium, skeleton. Slides. Dense Irregular Connective Tissue This image of the dermis shows irregularly oriented dense connective tissue. Connective tissue that features many densely packed fibers going in many different directions is known as dense irregular connective tissue. Loose Areolar Connective Tissue Macrophage. Dense irregular connective tissue (proper) Characteristics: interwoven meshwork Location: skin dermis & capsules of organs & joints (around cartilage and bone) Function: support & structural strength Hyaline cartilage. The connective tissue is the glue that holds all other tissues together, it has the important function of ensuring that our body systems work in harmony. Dense regular connective tissue. Features. The three broad categories of connective tissue are classified according to the characteristics of their ground substance and the types of fibers found within the matrix ().Connective tissue proper includes loose connective tissue and dense connective tissue.Both tissues have a variety of cell types and protein fibers suspended in a viscous ground substance. Dense irregular connective tissue: This tis-sue resembles dense regular connective tissue, but has much thicker bundles of collagen fibers arranged in an irregular pattern. Histology - Dense irregular conective tissue View Related Images. Connective tissues perform many functions in the body, but most importantly, they support and connect other tissues; from the connective tissue sheath that surrounds muscle cells, to the tendons that attach muscles to bones, and to the skeleton that supports the positions of the body. The primary elements of connective tissue . Dense regular connective tissue is an extremely important type of connective tissue that provides the structures that they bind and/or encase a great deal of protection because they are strong yet. Examples:- Tendons: connect muscle to bone and Ligaments: connect bone to bone. macrophage and eosinophil EM10. Show regular pattern of fibres. Dense irregular connective tissue (CT) surrounds hyaline cartilage, and is composed of a dense matrix of large collagen bundles, extracellular matrix and fibroblasts There are very few blood vesse . adipose tissue. skin; around blood vessels, muscles and body organs. Be able to recognize different types of connective tissue (e.g., dense irregular, dense regular, loose, adipose) and provide examples where they are found in the body. If you wish to identify the dense regular tissue slide under the light microscope, you might find out the following histological features from that slide. Identify the structure indicated. Connective tissues perform many functions in the body, but most importantly, they support and connect other tissues; from the connective tissue sheath that surrounds muscle cells, to the tendons that attach muscles to bones, and to the skeleton that supports the positions of the body. Dense connective tissue contains more collagen fibers than does loose connective tissue. Tissue characterized by a thick, random arrangement of collagen and . b. Dense irregular connective tissue (Figure 5) is composed of haphazardly arranged, densely packed collagen bundles with many purple stained fibroblasts present. The collagenous fibers are irregularly arranged in interwoven sheets that makes the tissue very strong. a. Location. Types of Connective Tissue. Dense irregular connective tissue (dict) is found in several places in the body. IUSM - 2016. These tissues are widely distributed and serve as a universal packing material between other tissues. mast cell. Widely dispersed throughout body; immediately beneath most membranous epithelial tissue, e.g. Dense regular connective tissue forms fascia, the fibrous mem-brane around muscles, muscle groups, nerves, and blood vessels. b. III. It consists of loosely arranged fibres and cells. dense irregular elastic connective tissue. Loose Connective Tissue. Dense regular connective tissues have parallel, densely. The functions of areolar connective tissue include the support and binding of other tissues. Dense Regular Connective •Provides strong attachment between structures that have Tissue forces pulling in one direction. Dense Connective Tissue: The three types of dense connective tissue are dense regular, dense irregular, and elastic tissue. Figure 02: Dense Irregular Connective Tissue Dense irregular connective tissues are also present in the sclera and within deeper layers of the skin. 2. Learning Objectives. Unformatted text preview: UNIT 4: Animal Tissues Major Types: Epithelial Tissues Connective Tissues Muscular Tissues Nervous Tissues Prepared by: Beverly F. Basalo, M.Sc. The areolar connective tissue lies deep under the epidermis and is . These connective tissues are specialized to protect the skin by making the skin resistant to tearing due to the application of higher forces from different directions. II. There are 12 flexor tendons in the hand and forearm. There are two types of dense connective tissues as dense irregular connective tissue and dense regular connective tissue. Dense connective tissue provides strength to the tissue, and the tissue is less flexible. These connective tissues are specialized to protect the skin by making the skin resistant to tearing due to the application of higher forces from different directions. Connective tissue develops from the inner lining of the embryo known as mesoderm. i) These tissues form the endoskeleton of the vertebrates that form a rigid framework that supports the body. Dense irregular connective tissue: In dense irregular connective tissue, the direction of collagen fibers is random. Connective tissue connects, separates & supports all other types of tissues in the body, it consists of cells surrounded by a compartment of fluid called the extracellular matrix (ECM). Some appear in cross section, and other longitudinally. plasma cell EM26. A. Function. Specialised Connective Tissues. Function This type of connective tissue is found mostly in the reticular layer (or deep layer) of the dermis. 5. Dense connective tissue can be further classified into dense regular connective tissue and dense irregular connective tissue. Distinguish the connective tissues from all epithelial tissues on the basis of location, cell density and the presence of discrete fibers. These collagen bundles or fibers cross each other at varying angles. 1. Classification of Connective Tissues. Dense Connective Tissue Cartilage Bone Blood As may be obvious from its name, one of the major functions of connective tissue is to connect tissues and organs. This creates a tissue that has tensile strength in all . Unlike epithelial tissue, which is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. The stroma supports the parenchyma, which in turn consists of those epithelial, muscle, or nerve cells which carry out the specific function (s) of the organ and which usually comprise the bulk of the organ. Its 3-dimensional structure allows it to withstand force from different directions. Connective tissue consists of a few cells, known as collagen or elastin, present in the intercellular network of protein fibers secreted by the cells . found in Function Capable of strength with stretching and recoil in several directions. Helps to provide structural strength. There are three major categories of dense connective tissue: regular, irregular, and elastic. The main function of dense connective tissue is to hold different structures to one another. Tendons are dense connective tissues that connect muscle to bone. Distinguish between loose irregular (areolar), dense irregular, or dense regular connective tissues on the basis of fiber packing and orientation. Forms tendons, ligaments and aponeuroses. It provides strong attachment between different structures. Tendon injuries most commonly occur in the hand. Dense connective tissue is another type of connective tissue proper that contains more fibers and the fibers are thicker and more densely packed with considerably fewer cells than in loose connective tissue. Be able to recognize a basement membrane (or basal lamina) in sections or micrographs where the structure is conspicuously present and understand its functions. between the loose CT and the underlying dense irregular CT,making a distinct border between the two types of tissue arbitrary. . mast cell. Histology Study of tissues (groups of cells that are similar in structure and function) 4 Tissue Types Epithelial Tissue Interface tissue that forms boundaries between environments and lines surfaces "epithe-" means . In this sense, the irregular dense connective tissue allows counteracting multidirectional tensions, while the regular dense connective tissue does it in a single direction (in the sense that its collagen fibers are oriented in parallel). Dense connective tissue. Dense irregular connective tissues - These connective tissues are densely spaced and the fibers and fibroblasts are randomly arranged. . Connective Tissue Dense Connective Tissue, Cartilage, Bone, Joints. As may be obvious from its name, one of the major functions of connective tissue is to connect tissues and organs. Unlike epithelial tissue, which is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. Dense Connective Tissue C. Specialised Connective Tissue. Dense irregular connective tissue consists primarily of the collagen bundles and elastic fibers and less connective tissue cells and ground substances. Reticular connective tissue . The very dark tissue on the top of the image is stratified squamous keratinized epithelium. The main function of dense connective tissue is to counteract mechanical stress. Dense connective tissue forms strong, rope-like structures such as tendons and ligaments. Collagen and elastic fibers spread in many directions, providing increased elasticity . The fibers are mainly composed of type I collagen. ii) It also protects the vital organs and helps in locomotion. Fibers are densely packed and organized in parallel to create a strong tissue capable of withstanding the pull of muscle and bone in movement. dense/loose irregular connective tissue, mammary gland (H&E) EM8. The dense irregular tissue's collagen fibers are larger, more numerous, and arranged in irregular configuration. Key: Collagen fibers cut longitudinally (along the length of the fiber) Collagen fibers cut transversely (across the width - indicating fibers are oriented in different directions) . Adipose connective tissue . found in lymphatic tissue, bone marrow, and liver function Provides superstructure for lymphatic tissues. I. Dense irregular connective tissue. . Unlike epithelial tissue, which has cells that are closely packed together, connective tissue typically has cells scattered throughout an extracellular matrix of fibrous proteins and glycoproteins attached to a basement membrane. Dense irregular connective tissue. Dense irregular connective tissue; Elastic connective tissue. Characteristics of Connective Tissue. Wiki User . Function: Able to withstand tension applied from many different directions. dense/loose irregular connective tissue, mammary gland (H&E) EM8. Irregular connective tissue is an irregular connective tissue, the intercellular matrix of which contains a dense irregular network of collagen and elastic fiber bundles. In dense regular connective tissue, you will find more densely packed and thicker collagen fibers along with less connective tissue cells and ground substances. What is the function of the dense connective tissue? They run in more than one plane, forming sheets . Lab 5 - Connective Tissue. As the name implies, connective tissue serves a connecting function: It supports and binds other tissues in the body. This arrangement gives the tissue greater strength in all directions and less strength in one particular direction.

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