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Chemistry

TermDefinition
Tissues Are a group of cells with a common embryonic origin that function together to carry out specialized activities
4 Types of Tissues Epithelial, Connective, Muscular, and Nervous
Epithelial Tissues Cover body surfaces and form protective barriers. Also form glands and line hollow organs, body cavities, and ducts. Secretes mucous, hormones, and other substances.
Connective Tissues Protect, supports, and bind organs. Ex: Fat, RBC, WBC, and Platelets
Muscular Tissues Generates heat used by the body and the physical force needed to make body structures move.
Nervous Tissues Detects changes in the body and respond by generating nerve impulses
Tissues develop from 3 primary germ layers known as... Endoderm, Mesoderm, and Ectoderm
Epithelial tissues develop from... all three germ layers
Connective and Muscle tissues develop from... mesoder
Nervous tissue develops from... ectoderm
Simple Squamous Epithelium Composed of a single layer of flat cells found in air sacs of lungs, capillaries, lining of blood vessels, heart, and lymphatic vessels.
Simple Cuboidal Epithelium Composed of a single layer of cubed shaped cells often found lining the tubules of the kidneys and many other glands.
Simple Columnar Epithelium Forms a single layer of column-like cells common in the digestive tract
Goblet cells Simple columnar cells that have differentiated
Pseudostratified Columnar Epithelium Appears to have layers due to having nuclei at various depths, but is a single layer of cells attached to the basement membrane. Characteristic of the upper respiratory tract
Stratified Squamous Epithelium Has an apical surface that is made up of squamous (flat) cells, with other layers that have different shapes--ideal for protection against strong friction forces. Featured in outer layers of skin
Stratified Cuboidal Epithelium Has an apical surface made up of two or more layers of cube-shaped cells located in sweat glads and part of urethra
Transitional Epithelium Cells change shape depending on the state of stretch in the tissue. Ex: Bladder domes cells when empty or flattened cells when full
Created by: 1237810412967709