Tissues Quiz

• Tissues - a group of cells that are similar in structure and function
• Histology - the study or tissues or a group o similar cells which perorm a definite function
• Epithelial tissue - generally occurs as sheets o tightly pack epithelial cells. It covers the outside of the body (epidermis) and lines organs and cavities inside the body (endothelium)
• Connective tissue - connects body parts, most abundant and widely distributed of the type
• Epithelial cells - fit closely together to form continuous sheet
• Avascular - have no blood supply of their own and depend on the diffusion from the capillaries in the underlying connective tissue for blood and oxygen
• simple epithelia - most concerned with absorption, secretion, and filtration, very thin, protection is not one of their specialties
• Simple squamous epithelium - single layer of thin squamous cells resting on a basement membrane, cells fit closely together, much like floor tiles. (Location: air sacs of lungs, and the lining of the heart. Function: allow materials to pass through by diffusion and filtration)
• simple cuboidal epithelium - one layer of cuboidal cells resting on a basement membrane. common in glands and air ducts.
• Simple columnar epithelium - made up of a single layer of tall cells that fit closely together
• Goblets cell - produce a lubricating mucus, seen in the this type of epithelium
• simple columnar epithelium - line body cavities open to the exterior are called mucosae or mucus membrane
• pseudostratified columnar epithelium - rest on a basement membrane, some cells are shorter than the other
• pseudostratified ciliated ciliated columnar epithelium - lines most of the respiratory tract
• stratified epithelia - consists o two or more layer, being considerably more durable than simple epithelia, primarly to protect.
• stratified squamous epithelium - most common stratified epithelium in the body, consists o several layers, is found in sites that receive a good deal of abuse or friction
• stratified cuboidal and stratified columnar epithelium - typically has just two cells layers and with the surface cells being cuboidal in shape
• stratified columnar epithelium - columnar cells but its basal cells vary in size and shape, both are fairly rare in the body, foundly mainly in the in the ducts of large glands
• Glandular epithelium - consists of one or more cells that make secrete a particular product -secretion- indicates an active process in which the glandular cells obtain needed materials from the blood and use to mae their secretion, which they discharge
• Endocrine glands - known "ductless glands", secretion diffuse directly into blood vessels that weave through the glands.
• Exocrine glands - retains their ducts and their secretions empty through the ducts to the epithelial surface. Include the sweat and oil glands, liver and pancreas are both external and internal
• Connective tissues - generally cells are scattered throughout the extracellular matrix, matrix maybe liquid, solid, or jelly like.
• loose connective tissues - collagenous fibers do not tear easily; elastic fibers resist stretching, rubbery; adispose tissue which store fat; blood, matrix is a liquid (plasma)
• fibrous connective tissues -dense, tightly woven and arranged in parallel bundles: tendons, ligaments, cartilage, bone
• Extracellular matrix - nonliving substance found outside the cells. composed of water, proteins ( polysaccharides molecules)
• bone - called osseous tissue, composed o bone cells made up of lacunae, surrounded by layers of a very hard matrix that contains calcium salt. (Functions: protect, support other body organs)
• cartilage - less hard and more flexible than bone