Flashcards in 4. epithelial tissues Deck (12)
attach to goblet cells for lubrication
attach to cilia in airways and reproductive tract
absorption of nutrients in intestine
columnar epithelial cells
allows for stretching and recoilability
transitional epithelial cells
protection from head/cold/microbes/chemicals
lining of heart, lungs, mucus membrane
flat sheets of very flat cells
squamous epithelial cells
lining ducts of sweat and oil glands of the skin
secrete mucus to protect exocrine gland ducts
cuboidal epithelial cells
6 characteristics of epithelial cells
continuous sheet-tightly packed cells prevent moment, gap junction allow passage.
exposed surface-open on one side, attached to "basement membrane"
avascular- have no blood vessels, nutrient obtained thru diffusion.
nerves- have many nerves to detect sensations and send information to brain.
regeneration-high capacity for renewal due to constant wear and tear.
secrete,absorb-mucus, nutrients, wastes
study of tissues
what are some protection functions of epithelial lining cells.
prevent: dehydration (waterproof)
:invasion of microbes
:damage "wear and tear" injury, chemicals
detection: sensory receptors for pain, chemicals (taste buds)
secrete directly into blood.
ex: hormones (insulin, throid gland, pituitary gland)
secrete into ducts that lead out of the body
ex:mucus membranes, sweat glands, salvia glands.