Organs of special senses I (96, 97, 9, 33) Flashcards
Eye
-> Identify
Identify
Vitreous body
What does fibrous coat include?
- Cornea
- Sclera
What does vascular coat include?
- Choroid
- Ciliary body
- Irus
What does nervous coat include?
Retina
Fibrous coat
-> Identify
1)epithelium (corneal epithelium).
2)bowman’s membrane.
3)stroma (substantia propria).
4)descemets membrane.
5)endothelium of anterior chamber.
6)nuclei of fibroblast.
Describe the epithelium of cornea (fibrous coat)
stratified squamous non-keratinized epithelium (5-6 layers without C.T papillae).
What is bowman’s membrane (2) (fibrous coat)?
thin homogenous acidophilic basement membrane , contains collagen fibers but no cells.
FIBROUS COAT
-> stroma (or substantia propria) (3) of the cornea contains several layers of ___
highly regular collagen fibers with fibrocyte
What is descemets’s membrane(4) of cornea? (fibrous coat)
thin homogenous acidophilic basement membrane , contains collagen fibers but no cells.
Describe the endothelium of anterior chamber of cornea (fibrous coat)
simple squamous epithelium
the endothelium of anterior chamber of cornea (fibrous coat) is simple squamous epithelium
-> What are the functions?
it serves the nutrition of the cornea from the anterior chamber and with its secretory activity maintains the descemets membrane.
Is the cornea a vascular tissue? (fibrous coat)
the cornea is Avascular tissue but has very rich sensory innervation (long cilliary nerve from v/1).
Describe the Conjunctiva of cornea (fibrous coat)
the epithelium of the cornea is continue with that of the conjunctiva (stratified squamous non keratinized epithelium) , but several C.T papillae are visible here. under the epithelium the lamina propria (loose C.T) is seen.
What is Sclera made up of? (fibrous coat)
the sclera is made up of dense C.T (collagen fibers and fibrocytes).
What does The cornel-scleral junction contain contain? (fibrous coat)
the canal of schlemm or sinus venous sclera
What is the cornel-scleral junction lined by ____
endothelium (draining the aqueous humor from the anterior chamber)
Identify
Eye
-> Identify
Sclera
Sclera
-> Identify
A) limbus(cornea sclera junction).
B) conjunctival epithelium.
C) ciliary body.
D) sclera.
1) conjunctiva.
2) endothelial lining in the canal of schlemm.
3) corneal epithelium.
*-canal of schlemm.
Eye
-> Identify
Eye
-> Identify
Eye
-> Identify
What is choroid?
highly vascular layer on the inner surface of the sclera with the 4 layers.
What are the 5 layers of choroid?
1)
suprachoroidal lamina (lamina fusca sclerae)
2) Perichoroidal space
3) vascular lamina
4) choriocapillary layer
5) bruch’s membrane (lamina basalis)
CHOROID
-> Characteristics of 1)
suprachoroidal lamina (lamina fusca sclerae)?
highly pigmented C.T cells with vessels and nerves.
CHOROID
-> Characteristics of 3) vascular lamina?
arterioles and venules occupy this layer
CHOROID
-> Characteristics of 4) choriocapillary layer?
contains a very rich network of fenestrated capillaries (for the nutrition of the outer part of the retina) choriocapillary layer from the retina.
CHOROID
-> Characteristics of 5) bruch’s membrane (lamina basalis)?
thin, acidophilic layer, separating the choriocapillary layer from the retina
What is bruch’s membrane (lamina basalis) composed of? (a layer of choroid)
It is composed of elastic and collagen fibers and basal laminae.
Describe the blood-retinal barrier
This 3-4 micrometer thick membrane of 5 layers : elastic fibers in the middle covered by collagen fibers on both sides,
outside the basal lamina of the capillaries of the choriocapillary layer, inside the basal lamina of the retinal pigment epithelium are found. this membrane from the blood-retinal barrier.
CHOROID (Vascular coat)
-> Identify
5)sclera.
CHOROID (Vascular coat
-> Identify
1)suprachoroidal lamina (lamina fusca sclerae).
2)vascular lamina.
3)choriocapillary layer.
4)bruch’s membrane (lamina basalis).
5)sclera.
6)retinal pigment epithelium.
7)Rods and Cones.
8)outer limiting membrane.
9)Outer plexiform layer.
10)choroid.
What is the function of choroid?
Provides nutritions to the rods and cones of the retina
What is ciliary body? What is it composed of?
a thickening of the vascular coat.
-> It is basically composed of loose C.T.
What is the function of ciliary body?
it exhibit the ciliary processes with wide fenestrated capillaries (for the production of the aqueous humor to the posterior chamber).
the inner surface of the ciliary body is covered by the ciliary part of the retina which has 2 layers
-> What are these 2 layers?
Two layers, unpigmented inner layer on the surface, and Pigment epithelium below
the ciliary muscle has 3 portions which are ___
meridional (brucke), radial and circular (muller) portions.
What is the function of ciliary muscle?
Ciliary muscle serves the accommodation.
What is the blood-aqueous humor barrier?
the basal lamina of the capillaries, the epithelial cells of the ciliary body (connected with the zonula occuludens) and their basal lamina or Stratum limitans forms the blood-aqueous humor barrier.
CILIARY BODY
-> Identify
3)pigment epithelium (part of ciliary epithelium).
4)unpigmented epithelium (part of ciliary epithelium).
8)lamina vitrea.
9)ciliary body.
CILIARY BODY
-> Identify
1)ciliary process.
5)ciliary muscle.
6)zonular fiber.
10)vascular layer of ciliary body.
CILIARY BODY
-> Identify
2)fenestrated capillaries (produce aqueous humor into post chamber)
3)pigment epithelium (part of ciliary epithelium).
4)unpigmented epithelium (part of ciliary epithelium).
7)ciliary epithelium.
8)lamina vitrea.
&-choroid.
VASCULAR COAT
-> Iris forms a diaphragm in front of the ____ (4 things)
lens, leaving and opening, the pupil.
VASCULAR COAT
-> What are the 4 layers of iris?
1) endothelium of the anterior chamber
2) stroma of iris
3) the dilator pupillae muscle
4) pigment layer of the iris
IRIS (VASCULAR COAT)
-> Describe the layer 1) endothelium of the anterior chamber?
simple squamous epithelium (disconnected layer, intermingled with fibroblasts and pigment cells).
VASCULAR COAT
-> Iris forms a diaphragm in front of the ____ (4 things)
lens, leaving and opening, the pupil.
IRIS (VASCULAR COAT)
-> Describe the structure of layer 2) stroma of iris?
loose C.T with fibroblasts and pigment containing C.T cells (giving color to the iris)
IRIS (VASCULAR COAT)
-> Type of 3)the dilator pupillae muscle? (embryology)
a neuro ectodermal smooth muscle (myoepithelium) arranged in the inner side of the iris stroma, has sympathetic Innervation.(sup cervical ggl).
IRIS (VASCULAR COAT)
-> Describe layer 4) pigment layer of the iris
a double layer of heavy pigmented meloncytes (iridic part of the retina).
IRIS (VASCULAR COAT)
-> Identify
5.1) outer layer.
5.2) inner layer.
7) stromal melanocyte.
C- capillary.
IRIS (VASCULAR COAT)
-> Identify
1)endothelium of anterior chamber.
2)stroma of iris.
3)dilator pupillae muscle.
4)sphincter (constrictor) pupillae (iridial constrictor).
5)pigment layer of the iris (iridial epithelium).
5.1)outer layer.
5.2)inner layer.
6)lens capsule.
L-Lens.
Eye
-> Identify
Eye
-> Identify
Eye
-> Identify
Eye
-> Identify
97)Retina (semi-thin section, toluidine blue)
-> What are the 10 layers of retina?
1) pigment epithelium
2) Rods and Cones
3) Outer limiting membrane
4) Outer nuclear (granular) layer
5) outer plexiform layer
6) inner nuclear (granular) layer
7) inner plexiform layer
8) ganglion cell layer
9) Optic nerve fiber
10) Inner limiting membrane (10)
97)Retina (semi-thin section, toluidine blue)
-> Identify 1 -> 4
1) pigment epithelium.
2) cons and rods.
3) outer limiting membrane.
4) outer granular membrane.
97)Retina (semi-thin section, toluidine blue)
-> Identify 5 -> 8
5) outer plexiform layer.
6) inner granular layer.
7) inner plexiform layer.
8) ganglion cell layer.
97)Retina (semi-thin section, toluidine blue)
-> Identify 9 -> 12
9) optic nerve fibers.
10) inner limiting membrane.
11) choroid.
12) Bruchs membrane.
97)Retina (semi-thin section, toluidine blue)
-> Identify V
vitreous body
Retina
-> Identify
97)Retina (semi-thin section, toluidine blue)
-> Describe structure of 1)pigment epithelium
simple cubed epithelium with brown melanin granules.
97)Retina (semi-thin section, toluidine blue)
-> What is the Outer limiting membrane formed by?
the peripheral processes of the muller glial cells.
97)Retina (semi-thin section, toluidine blue)
-> What does Outer nuclear (granular) layer contain?
nucleus of rods and cones are placed here.
97)Retina (semi-thin section, toluidine blue)
-> Which layer is the first synaptic layer?
outer plexiform layer
97)Retina (semi-thin section, toluidine blue)
-> Which layer is the second synaptic layer?
inner plexiform layer
97)Retina (semi-thin section, toluidine blue)
-> What does the inner nuclear (granular) layer contain?
thinner, than the outer nuclear layer, containing less but larger nuclei of the bipolar cells
and also of the horizontal, amacrine cells and muller glial cells.
97)Retina (semi-thin section, toluidine blue)
-> Describe structure of 1)pigment epithelium
simple cubed epithelium with brown melanin granules.
97)Retina (semi-thin section, toluidine blue)
-> What is the Inner limiting membrane made by?
the inner processes of the muller glial cells.
What are Pigment cells of retina?
cuboidal, pigment containing epithelium cells with melanin granules (2) in their cytoplasm.
9)Pigment cells (retina, unstained)
-> The cell membrane and nuclei are areas devoid of ____
pigment granules:negative nucleus (1) and bright cell borders (3).
9)Pigment cells (retina, unstained)
-> Identify
cuboidal, pigment containing epithelium cells with melanin granules (2) in their cytoplasm.
9)Pigment cells (retina, unstained)
-> Identify
1)negative nucleus.
2)melanin granules.
3)cell borders.
33)Lacrimal gland (H-E)
Can adipose tissue be found inside the lobules?
NO
33)Lacrimal gland (H-E)
-> Serous acini (1): compound of ___ gland
tubulo - alveolar
33)Lacrimal gland (H-E)
the wall of the excretory ducts is lined by ___ epithelium
Double layered cuboidal
33)Lacrimal gland (H-E)
Is lacrimal gland an exocrine or endocrine gland?
Exocrine gland
33)Lacrimal gland (H-E)
-> Identify
1)serous acinus.
2)C.T septum.
3)interlobular (excretory duct).
4)adipose tissue.
5)lobule.
A)artery.
V)vein.
