Anat/phys/biochem Lab 3 - Histology Of The Uveal Tract

Front 1

these are deficiencies of the anterior border layer near the collarette

Back 1

crypts of Fuch

Front 2

this structure is composed of loose CT (collagen fibrils, fibroblasts, ground substance), blood vessels, nerves, and chromatophores

Back 2

stroma

Front 3

these are composed of a single layer of unfenestrated endothelium

Back 3

the capillaries

Front 4

T/F
the capilaries are composed of a single layer of unfnestrated endothelium

Back 4

T

Front 5

this smooth muscle structure is located in the pupillary portion of the stroma and is firmly attached to the stroma that surrounds it

Back 5

spincter muscle

Front 6

this layer has an epithelial apical section that is usually heavily pigmented and a non-striated muscular basal section that projects into the stroma

Back 6

anterior epithelium (myoepithelium) (toward the stroma)

Front 7

this is a single layer of heavily pigmented columnar cells whose shape and nuclei are difficult to visualize b/c of the melanin

Back 7

posterior epithelium (toward the posterior chamber)

Front 8

lumens of these vessels will be evident in some slides

Back 8

stroma

Front 9

This connective tissue layer, a modification of the stroma, is composed of fibroblasts and melanocytes

Back 9

anterior border layer of the Iris

Front 10

this layer is too thin to be seen w/ the light microscope

Back 10

Bruch's membrane

Front 11

this loose CT of the ciliary body fills the processes

Back 11

ciliary stroma

Front 12

this layer curves around to the anterior surface at the pupilary margin forming the pupillary ruff

Back 12

posterior epithelium (toward the posterior chamber)

Front 13

this type of crypt is located near the iris root

Back 13

peripheral crypts

Front 14

T/F
the capillaries are composed of a single layer of fenestrated endothelium

Back 14

F
the capillaries are composed of UNFENESTRATED endothelium

Front 15

this layer of the anterior epithelium (myoepithelium) is the non-pigmented muscular basal section that projects into the stroma

Back 15

basal section

Front 16

the posterior epithelium curves around to the anterior surface at the pupil margin forming the ____ ___

Back 16

pupillary ruff

Front 17

the transition of the inner non-pigmented epithelium from posteriorly neural layers and anterior/posterior iris epithelium takes place where

Back 17

the ora seratta

Front 18

this ciliary epithelial layer is continuous posteriorly w/ the pigment epithelium of the retina and anteriorly w/ the anterior iris epithelium

Back 18

Outer pigmented epithelium

Front 19

these have an unusually thick collagenous adventitia
-what else also have the same characteristics?

Back 19

iris blood vessels
-even the arteries

Front 20

these are branching cells found throughout the stroma and are one of the factors that determine iris color

Back 20

melanocytes

Front 21

this muscle extends from the iris root to approximately the midpoint of the sphincter

Back 21

dilator muscle

Front 22

this layer contains specialized fenestrated capillaries whose lumen is particularly wide

Back 22

choriocapillaris

Front 23

this substance forms the core of the ciliary processes

Back 23

ciliary stroma

Front 24

this is the outermost layer of the ciliary body and is composed of a meshwork of collagen and elastic fibers that insert into the sclera externally and the ciliary muscles internally

Back 24

supraciliaris

Front 25

these allow fluid to quickly enter and exit the iris stroma during contraction and dilation

Back 25

iris crypts

Front 26

these cells are found mainly in the region of the sphincter muscle and are thought to be filled with pigment derived from embryonic neural ectoderm

Back 26

clump cells

Front 27

this muscle fibers are of the basal section of the anterior epithelium (myoepithelium)

Back 27

dilator muscle

Front 28

what four things is the loose CT in the stroma made up of

Back 28

collagen, fibrils, fibroblasts, ground substance

Front 29

these are pigmented cells found in the iris and may be either melanocytes or clump cells

Back 29

Chromatophores

Front 30

these are the principal cells of the iris stroma

Back 30

fibroblasts

Front 31

this muscular cell layer has an epithelial apical section that is usually heavily pigmented

Back 31

Anterior epithelium (myoepithelium)

Front 32

at the midpoint of the sphincter, the myoepithelial cells are replaced by ____ ____ cells, which then continue to the pupillary margin

Back 32

cuboidal epithelial

Front 33

this membrane is a collagen and elastic fiber membrane that is firmly attached to the choriocapilaries externally, and forms the basement membrane of the pigment layer of the retina internally

Back 33

Bruch's membrane

Front 34

this choroidal structure permits expansion or contraction and some sliding of the choroid w/o detaching from the sclera

Back 34

suprachoroid

Front 35

this ciliary epithelial layer is continuous posteriorly w/ the neural layers of the retina and anteriorly w/ the posterior iris epithelium

Back 35

Inner non-pigmented epithelium

Front 36

this layer of the ciliary body allows movement of choroid against sclera and is the site for detachments

Back 36

supraciliaris

Front 37

T/F
the capillaries are composed of unfenestrated epithelium

Back 37

F
the cappillaries are composed of unfenestrated ENDOTHELIUM

Front 38

these are large round cells filled with melanin granules

Back 38

clump cells

Front 39

this layer may be difficult to see (wont have to ID)

Back 39

choriocapillaris

Front 40

this structure is the continuation of supraciliaris (b/t choroid and sclera)

Back 40

suprachoroid

Front 41

this loose connective tissue (of the ciliary body) is located internal to the ciliary muscle and is continuous w/ the choroid stroma posteriorly and the iris stroma anteriorly

Back 41

ciliary stroma

Front 42

this heavily pigmented connective tissue layer is primarily composed of blood vessels

Back 42

Stroma

Front 43

this structure lies w/i the ciliary stroma (of the ciliary body) near the iris root

Back 43

Major Circle of the Iris

Front 44

this network of smooth muscle cells of the ciliary body extends from the scleral spur to the ora seratta

Back 44

ciliary muscle

Front 45

this connective tissue layer is continuous w/ the supraciliaris and is composed of a meshwork of collagen fibrils that join the choroid to the sclera

Back 45

suprachoroid