Term
|
Definition
single layer of flat cells
substances pass easily through
(diffusion!)
line air sacs (O2 and CO2 pass)
line blood vessels
line lymphatic vessels
easily damaged because it’s so
thin |
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Term
|
Definition
single layer of cube-shaped
cells
centrally located nucleus
line kidney tubules
cover ovaries
line ducts of some glands
(ex: salivary) |
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Term
|
Definition
single layer of elongated cells:
makes tissue thick and able to
protect underlying tissues.
nuclei usually near the basement
membrane at same level
sometimes possess cilia
non-ciliated line uterus and portions
of digestive tract.
sometimes possess microvilli: increase
surface area for absorption
often have goblet cells: secrete protective fluid (mucus)
onto the free surface of the tissue. |
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Term
| Pseudostratified columnar |
|
Definition
single layer of elongated
cells
appear to be layered
nuclei at two or more levels
often have cilia
often have goblet cells-
secrete mucus.
line respiratory passageways:
mucus traps dust &
microorganisms. Cilia move
mucus up/out of airways. |
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Term
|
Definition
many cell layers=thick tissue
outer layer of skin
deep layers are cuboidal or
columnar. It’s where cell
division occurs.
top cells are flat (older cells)
can accumulate protein called
keratin.
keratin produces dry, tough,
protective material that keeps
water from escaping and micro-
organisms from entering.
keratinized cells harden and die
Also lines oral cavity, vagina,
anal cavity (non-keratinized). |
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Term
|
Definition
2-3 layers
cube-shaped cells
form lining of lumen.
layers provide protection.
line ducts of mammary glands, sweat glands, salivary glands, and the pancreas |
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Term
|
Definition
top layer of elongated cells
cube-shaped cells in deeper layers
line part of male urethra and part of pharynx |
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Term
|
Definition
many cell layers
cube-shaped and elongated cells
specialized to change in
response to tension
line urinary bladder, ureters, and part of urethra |
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