Where does the ciliary body lie in comparison to the rest of the uveal components
in the middle
Mesoderm and neuroectoderm
When does this develope
3rd mo of embryonic life, but not fully formed until after birth
Functions of the Ciliary Body
Aq. Humor formation
2 regions of the Ciliary Body
Pars Plana- Orbicularic Ciliaris
Pars Plicata- Corona Ciliaris
Continuous into choroid and retina (w epith cells)
junction bw the ciliary body(pars plana) and retina
ANT region- ridged
Ciliary Processes- increase SA, Vascularity, and produce aq
FENESTRATED capillaries, with increase resistance to pressure
LITTLE connective tissue- bc then fluid couldn't flow as easily
What area in the uvea is the only one to contain Fenestrated capillaries
Layers of the Ciliary Body
Ciliary Body Stroma
Epithelium is split into two parts
Pigmented epithelium (Ext row)
Ciliary epithelium (Int row)
pigmented from RPE up to Iris, where it ends and Iris begins
Increase of organelles= increase metabolic for Aq formation
becomes NEURAL retina
Ciliary Body Stroma
increased number of BV and Nerves
Sensory innervation- ophthalmic sensory fibers
Ciliary Muscle has 3 arrangements of fibers
Meridonial Fibers (longitidunal)
bulk of fibers, PARALLEL to outer coat
OBLIQUE orientation, out from scleral spur
Circular Fibers(most internal)
Ciliary Body is the largest...
Smooth Muscle in the eye!
Basement membrane wraps around cells except for
areas with Desmosomal and Gap Junctions- contraction
What kinds of innervation is present
Diffuse- single nerve can innervate multiple muscles fibers
The Arteries and Arterioles have what kind of innervation
Parasympathetic Innervation (III)
Short Ciliary Nerves- Vertical
Long Post. Nerves- Horiz
Parasympathetic Innervation (VII)
innervation of BV and Aq Formation
innervate ANT at Apex of Ant chamber
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