Tissue Flashcards
4 fundamental types of tissue
Epithelial
Connective
Muscular
Nervous
diverse group that includes:
- surface
- glands/solid organs
Epithelial tissue
Forms the outer covering of the skin and outer covering of some internal organs
Epithelial tissue
Also lines body cavities, blood vessels, ducts, and the interiors of the respiratory, digestive, urinary, and reproductive systems
Epithelial tissue
Surface exposed to a body cavity, lining of an internal organ, or the exterior of the body
Apical surface
Epithelial tissue that is Deep to the surface
Basal surface
Face cells on either side
Lateral surfaces
Function of epithelial tissue
- protection
- secretion
- absorption
Cell shapes
- squamous cells
- cuboidal cells
- columnar cells
thin, and this allows for the rapid passage of substances through them
Squamous cells
as tall as they are wide and are shaped like cubes or hexagons. They may have microvilli at their apical surface and function in either secretion or absorption.
Cuboidal cells
much taller than they are wide, like columns, and protect underlying tissues. Their apical surfaces may have cilia or microvilli, and they often are specialized for secretion and absorption.
Columnar cells
3 types of epithelial tissue
Simple, stratified, transitional
Type of epithelial tissue which is composed of a single layer of identical cells
Simple
Type of epithelial tissue that consists of layers
Stratified
(simple epithelium)
◦ Rectangular-shaped
◦ Alimentary tract
◦ Absorption, secretion
◦ Goblet cells
Simple columnar
(stratified epithelium)
◦ Wet surfaces
◦ Lining of mouth, pharynx, esophagus, vagina
Non-keratinized
(stratified epithelium)
* Dry surfaces
◦ Wear and tear
◦ Skin, hair, nails
Keratinized
(simple epithelium)
With fine hair-like processes – CILIA
◦ Movement
◦ Respiratory passages
Simple ciliated
A ___ may consist of one cell or a group of highly specialized epithelial cells that secrete substances into ducts, onto a surface, or into the blood
gland
Glands are either _____ or ____
Endocrine or exocrine
_______ enter the interstitial fluid and then diffuse into the bloodstream without flowing through a duct. These secretions are called ______
Endocrine glands, hormones
_______ secrete their products into ducts that empty at the surface of covering and lining epithelium such as the skin surface or the lumen of a hollow organ
Exocrine glands
◦ One of the most abundant and widely distributed tissues in the body
Connective tissue
◦ Connective tissue consists of two basic elements: ____ and _______
cells, extracellular matrix