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Epithelial cells
Mrs. Kamienski A&P epithelial cells
| term | definition |
|---|---|
| Histology | study of tissues |
| Tissues | a group of cells that perform the same function |
| 4 major types of tissues | epithelial, connective, muscle, nervous |
| basement membrane | the underside of epithelial tissue which connects to connective tissue |
| Simple Squamous function | diffusion of gases, filtration |
| Simple Squamous locations | lungs, aveoli, capillaries |
| Simple Squamous description | single layer of irregular, thin, flattened cells |
| Simple Cuboidal function | secretion and absorption of glandular products |
| Simple Cuboidal locations | ovaries, ducts of salivary, thyroid glands, kidneys |
| Simple Cuboidal description | single layer of cube like cells with a centrally located nucleus |
| Simple Culumnar function | absorption of nutrients, secretes digestive fluids |
| simple Culumnar locations | linings of digestive system, reproductive system |
| simple culumnar description | long column like cells whose nuclei are found around basement membrane, have goblet cells mixed in between and microvilli |
| Microvilli | function to increase surface area for absorption |
| Goblet cell | flask liked shaped glandular cells which secrete protective mucus on tissue to trap dirt/ debris |
| psuedostratified culumnar desription | appears to be layered but isn't, has cilia which extend from the free surface and move constantly, goblet cells mixed in |
| psuedostratified culumnar function | move mucus, sex cells along |
| psuedostratified culumnar location | respiratory tract, tubes of reproductive system |
| stratified squamous description | stacked squamous cells, layer on layer, oldest cells pushed outward |
| stratified squamous function | forms outerlayer of skin, protection |
| stratified squamous location | skin, mouth, vagina, anus, throat |
| transitional description | when contacted looks like many layers of cells, when stretched looks like a thin layer of cells |
| transitional function | specialized to withstand tension of movement and barrier to prevent waste from diffusion |
| transitional locations | lining of bladder, urinary system |
| glandular epithelium | cells specialized to secrete and produce substances |
| gland | one or more cells usually culumnar or cuboidal that secrete substances |
| Endocrine glands | secrete into tissue fluid or blood, 3 types: merocrine, apocrine, holocrine |
| holocrine | releases entire cells like sebaceous glands |
| apocrine | loose small portions of cells, mammary glands |
| merocrine | secrete fluis without loss of cytoplasm, pancreas, salivary |
Created by:
bkamienski
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