Iris and Ciliary Body Flashcards
All exocrine glands have what type of tissue?
Secretory epithelium
Ora Seratta is what?
transition point between anterior and posterior uvea
Ciliary muscle is located where?
Ciliary body
Pupilary margin also called? is it pigmented? what does it rest on?
pupilary ruff, YES, lens.
Iris stroma is continuous with which other stroma?
ciliary body stroma
Sclera and cornea are what types of connective tissue?
Dense regular CT
what two chambers does the iris separate?
anterior and posterior
Iris is attached by what? and that is where?
root at angle of anterior chamber.
is the iris root thinner or thicker compared to central? therefore?
thinner therefore more susceptible to damage.
What type of tissue is on the posterior iris? Which section of this tissue is continuous with the ciiary processes (pars plicata) and pars plana?
bilayer epithelium (anterior= lighter pigment, posterior= darker pigment) Posterior is continuous.
What is the avg pupilary diameter (range)? what muscle is this controlled by?
1-8mm sphincter muscles (circular)
What separates the pupilary region and ciliary region in the pupil? which region is bigger?
collarette
ciliary region
furrows are what type of muscle? when are they more noticeable?
circular muscles allow for contraction, in dark iris.
What are crypts?
holes in the anterior iris, allowing fluid to move from anterior chamber to iris stroma.
the cells in the posterior bilayer epithelium of the iris are arranged how?
apex to apex therefore basal on either side of that.
which layer of the bilayer epithelium in the posterior iris has processes? what are they? which holds what muscle? innervated by?
anterior portion, myoepithelial portion which holds the dilator muscle (innervated by symp)
which layer of the iris is the sphincter muscle located in?
stroma
What are the four layers of the iris?
- Anterior border: has crypts!
- stroma: loose CT, also has crypts
- Bilayered epithelium which is broken into anterior myoepithelium and posterior pigmented epithlium.
which cell types are present in the iris stroma?
fibroblasts, melanocytes, collagen, macros and mast cells.
are there crypts in the posterior chamber? where are they?
NO (it has tight junctions, fluid cant get through) they are in anterior chamber.