Adipose tissue, connective tissue consisting mainly of fat cells (adipose cells, or adipocytes), specialized to synthesize and contain large globules of fat, within a structural network of fibres. Epithelial cells that secrete substances onto the surface of the epithelium. by cells in the extracellular matrix. Histology Guide © Faculty of Biological Sciences, University of Leeds | Credits. (most common), Loose Connective tissue, Adipose Tissue, Dense regular connective tissue, Dense Irregular connective tissue. Specialised forms of extracellular matrix also These are powerfully resistant to axially loaded tension forces, but allow some stretch. Superb! Kidney tubules, exchange surfaces of the lungs, lining of ventral body cavities, and lining of blood vessels and inner surfaces of the heart. Continually repair and renew cells, found in bottom layers of epithelial tissues near the basement membrane. Mucous acini- mucous cells surround large lumen. Helps in expelling secretory products from the acini. Cells attached by hemidesmosomes. Which two tissue types are excitable? We are planning to print an album containing histology drawing, diagram for our students. This type of tissue is found in ligaments (which link bone to bone at joints) and tendons (connections between bones or cartilage and muscle). Connective tissue fills the spaces between organs and tissues, It is the layer of skin underneath the epidermis, called the dermis. tissue, blood - white blood cells) or metabolic maintenance (adipocytes, which have been secreted by the fibroblasts, and the major component Beat in coordinated waves to move materials across epithelial surface. Each mucous cell is columnar in shape with flat nucleus pushed towards the basement membrane and the cytoplasm appears pale, frothy due to washing off of mucinogen granules during the slide preparation, Serous demilune / crescents of Gianuzzi- mucous acini capped with serous cells in the form of half moon or crescent shape, Chorionic villi- Primary chorionic villi (core of cytotrophoblast cells covered by syncitiotrophoblast), secondary villi (core of mesoderm covered by cytotrophoblast and syncitiotrophoblast), tertiary villi (core of mesoderm with fetal blood vessels covered by cytotrophoblast and syncitiotrophoblast), Intervillous spaces: filled with maternal blood, Wharton’s jelly is a mass of loose connective tissue with fibroblasts separated by fine collagen fibers and ground substance containing hydrated glycosaminoglycans rich in hyaluronic acid. Fibroblasts- produce and maintain connective tissue fibers and ground substance. (Dense regular)Found in tendons, ligaments, covers skeletal muscles, capsules for internal organs. in tissues specialised for protection (haemopoietic The extracellular matrix is made up of fibres Found in dermis of skin, digestive tract, respiratory and urinary tracts, around blood vessels, nerves, and joints. (trachea). Hi, I writing to you from Azerbaijan. (action potential). crisp and to the point. This is an example of dense regular connective tissue. feature in tissues with a mechanical function Can we use yours? In this type of tissue, the collagen fibres are densely packed, and arranged in parallel. Specialized in conduction of electrical impulses from one region of the body to another. Germinal center is the active site of lymphocyte proliferation, Thymus shows age changes. Contains fibroblasts and collagen fibers. Adipose tissue, body fat, or simply fat is a loose connective tissue composed mostly of adipocytes. ... brown and white adipose tissue TISSUE / ORGAN: fat stored in body brown fat cell (brown adipocyte) Enzymes entering digestive tract, perspiration on skin, milk produced by mammary glands. and ligaments, and is shown below. makes up tendons, cartilage, Notice how the fibres are all aligned. Protects underlying tissues.Found where there is a lot of stress at the surface. (b) A diagram of a single multilocular adipocyte showing the central nucleus, numerous small lipid droplets (yellow), and many mitochondria. Can you identify the cells (fibroblasts) and collagen fibres? Specialized cells, protein fibers, and ground substance. Specialized for contraction( involves interaction between myosin and actin). connective tissue. They contain blood vessels and nerves providing nutrition to bone, Epimysium- dense irregular connective tissue, perimysium- less dense irregular connective tissue, endomysium- thin connective tissue, Sarcolemma- cell membrane, plasma membrane, Sarcomere- functional contractile unit of muscle fiber having contractile proteins actin and myosin, extends between two Z lines, I band is formed by only actin filaments attached to Z line. Contains collagen fibers, Fibroblasts, fat cells, elastin fibers, Mast cells, ad macrophage cells. (Dense Irregular) Dermis of skin. ), Chondrocytes arranged in the form of cell nest prevalent in the center, Cell nest/ isogenous group- 2 to 4 cells present in groups surrounded by territorial matrix, Lamellae are thin plates of fibers and calcified matrix, Lacunae are spaces with osteocytes present between two lamellae, Canaliculi are thin spaces extending from lacunae with cytoplasmic processes, Haversian canals are surrounded by concentric lamellae, Volkmann's canals pass through lamellae connecting two Haversian canals. These labelled diagrams should closely follow the current Science courses in histology, anatomy and embryology and complement the virtual microscopy used in the current Medical course. blood - red blood cells). can form bone or teeth. tissues and organs. The secretions are produced from the pancreas, thyroid, and pituitary gland. Cells are the predominant feature lines the stomach, intestinal tract, and excretory ducts. Provides support but tolerates distortion without damage and returns to original shape. dense regular connective tissue which is found in tendons Adipose tissue is a lipid-storing type of loose connective tissue.Also called fat tissue, adipose is composed primarily of adipose cells or adipocytes. (Characteristics) Cellular, Polarity-free and basal surface, Supported by connective tissues/fibers, Avascular-blood vessels, regeneration-mitosis, Innervation-nerves. General connective tissue is Permits expansion and recoil after stretching. This is an example of dense irregular connective tissue. and extracellular matrix. Functions and Characteristics of Epithelial Tissues. CONNECTIVE TISSUE PROPER (examples of these are shown below). It contains collagen fibres and fibroblasts. For example, if the matrix is calcified, it Found urinary bladder, kidneys, and ureters. ( heart, skin muscles). General histology - specific points The identification features of the particular slide with little bit of explanation is given. cartilage - (see the topic on bone and cartilage) adipose tissue (see adipose cells) haemopoietic tissue (bone marrow, lymphoid tissue) Small finer-like projections of the surface of an epithelial cell. Randomly arranged bundles of nerve fibers, Fascicles of nerve fibers are the peripheral processes of bifurcating single axon of unipolar neuron. Found in buttocks, breasts, around eyes, and kidneys. Contains adipocytes. Cushions organs, permits movement but still give support like jello. If you are interested please contact me on [email protected] you Sherif Ibrahim, Shut up and kiss me. It is found mainly under the skin but also in deposits between the muscles, in the intestines and in where absorption and secretion take place, such as digestive and urinary tracts. Moves food, urine, and reproductive tract secretions; controls diameter of respiratory passageways, regulates diameter of blood vessels.

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