Question | Answer |
tissues | are group of cells that are similar to each other in structure and function |
four types of tissues | epithelial, connective, nervous, and muscular |
histology | study of tissue |
epithelial tissue | also called epithelium, forms large, continuous sheets, helps form the skin |
| and covers the entire outer surface of the body also line most of the inner cavities |
| such as the mouth, respiratory tract, and reproductive tract |
simple squamous | walls of blood vessels(capillaries)alveoli (sacs in lungs |
| kidneyspermits the exchange of nutrients and wastes |
| allows diffusion of oxygen and carbon dioxidefiltration of water and electrolytes |
simple cuboidal | lining of kidney tubulesvarious glands |
| absorption of water and electrolytessecretion of enzymes and hormones |
simple columnar | digestive tractprotection, absorption and secretion of gastric |
| juices, often contains goblet cells (mucous) |
pseudostratified columnar | lining of respiratory tractlining of reproductive tubes (fallopian tubes) |
| protection and secretion; cleans respiratory passages; sweeps egg toward uterus |
stratified squamous | outer layer of skinlining of mouth, esophagus, anus, and vagina |
| protects body from invading microorganisms withstands friction |
transitional | urinary bladderpermits expansion of an organ |
epithelial tissue | forms continuous sheets that fit together has two surfaces, one surface is unattached |
basement membrane | is a very thin material that anchors the epithelium to the underlying tissue |
glandular epithelium | function is secretion |
gland | is made up of one or more cells that secrete a particular substance; much is composed of |
| simple cuboidal epithelium |
exocrine gland | have ducts or tiney tubes into which the exocrine secretions are released before |
| reaching the body surfaces or body cavities; include mucous, sweat, saliva, digestive enzymes; the ducts carry the exocrine secretions to surgace of skin |
endocrine glands | secrete hormones; do not have ducts and are called ductless glands, secreted directly into blood to their action sites |
| most abundant of tissues, widely distributed |
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