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A&P ch. 5 histology
Histology, definitions
| Term | Meaning |
|---|---|
| Histology | study of tissues |
| matrix or extracellular material | filled with fibers and ground substance |
| ectoderm | gives rise to the epidermis and nervous system |
| endoderm | gives rise to the lining of the digestive and respiratory tracts and to the digestive glands |
| mesoderm | gives rise to muscle, bone, blood, and other tissues |
| angles of observation | longitudinal, cross, transvers, and oblique |
| epithelial tissue | covers the body surface, lines body cavities, and covers many organs |
| basement membrane | made up of collagen and glycoproteins |
| simple squamous epithelium(SSE) | is once cell layer thick and is well-adapted to transporting substances across it, single centrally located nucleus |
| goblet cells | mucus secreting, wing glass shaped |
| alveoli | lining of the lungs (SSE) |
| endothelium | the walls of the capillaries are made with the SSE but called this |
| Simple cuboidal epithelium | made up of a single layer of cube shaped cells with a centrally located mucleus common in glands, lines the kidney tubules, and lung bronchioles |
| Simple columnar epithelium | single layer of vertically elongated thin cells, nuclei are present in the basal 1/3 of the cell, often has secretory function, absorbs nutrients in teh small in testine, and found in lining of the uterine tubes, and uterus, stomach, and large intestine |
| pseudostratified epithelium | not every cell reaches the basement membrane, abundant in the respiratory tract where it is ciliated and produces mucus, also found in male reproductive tract |
| Stratified squamous epithelium | surface cells of this are flattened, and pushed to the surface, ex skin |
| stratified cuboidal epithelium | lines the follicles in the ovary and seminiferous tubules in the testes, sweat ducts are also lined with this type of tissue |
| stratified columnar epithelium | rare tissue, found in short transitional zones where one type of epithelium grades into aother, ex pharynx, larynx, and canal, and male urethra |
| transitional epithelium | is found in the uniary system where it is capable of disention, thought to rep. a transitional stages btwn. stratified squamous, and stratified columnar epithelium |
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hisangel081103
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