internal structures Flashcards
(28 cards)
what does the uvea do
nourish interior
immune response
lens accommodation
What are some characteristics of the iris
Anterior portion of the uvea
Diaphragm in front of lens
Has pupil in center
What does iris do
regulate amount of light coming into eye
What are the two zones of the iris
Pupillary zone-inner layer
Ciliary zone-outer zone
What two things can change eye color
Inflammation
Neoplasia
What is the purpose of the corpora nigra
acts as a shade
Where is the ciliary body
middle portion of uvea
What does the ciliary body do
Produce aqueous humor
anchor for lens
What is the aqueous humor
Fills the anterior/postior chambers
Nutrition to lens and cornea
Waste sink
balance inflow/outflow
how is aqueous humor produced activly
active production by selective transport by carbonic anhydrase and Na+K+ATPase
Where does AqH outflow through mostly
iridocorneal angle
What does the choroid do
provide O2 and nutrition to retina
Where is the chorid
Between sclera and retina
What is in the uvea
iris
ciliary body
Choroid
What does the tapetum do
Reflect light to interact with retina a second time
What kind of tapetum do carnivores have
Cellular
What kind of tapetum do herbivores have
Fibrous
What do blood ocular barriers do
Maintain ocular privilege
limit damage to ocular structures by systemic conditions
What does the tapetum do
Reflect light to interact with retina a second time
What kind of tapetum do carnivores have
Cellular
What kind of tapetum do herbivores have
Fibrous
What do blood ocular barriers do
Maintain ocular privilege
limit damage to ocular structures by systemic conditions
What are zonules
ligaments that suspend lens
What is the largest structure in the eye
viterous
