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Time for some more anat hell! \o/ Since I got the second half of this two unit course waived by the school, I'm going to study the rest of the material on my own before August without having to worry about exams :E
Sensory receptors
Free nerve endings --> least specialized (free!! do what you want /o/); pain and temperature
+ epidermal cells = Merkel disc & hair follicle receptors --> light touch
Tactile corpuscles --> hairless skin only (for skin w/ hair you have the follicle receptors); light touch
Bulbous corpuscles --> deep pressure, stretch (think of bulbous balloons, can stand a lot of pressure blowing into them and they stretch)
Lamellar corpuscles --> deep in dermis; first application of deep pressure and then the bulbous takes over; used for high frequency vibrations (lamellar is like thin sheets of stuff, like laminated paper that you wave around and it makes that cool vibrating sound lmao)
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Visual System a.k.a. YOU MISSED YOU CHANCE AT DISSECTING A COW EYE ASLFDKJH
Lacrimal apparatus (now every time you cry you can think about anat and cry even more :x):
Lacrimal gland (tears are actually stored above and lateral to the eyeball so they can flush things off the surface)
--> Lacrimal puncta (puncta = points, you can see this if you pull back the bottom eyelid and look medial for that little hole)
--> Lacrimal canaliculi (water is carried through a canal)
--> lacrimal sac (collects tears)
--> nasolacrimal duct (SNOT EVERYWHERE, this is why your nose runs when you cry)
Eye structures
Palpebrae: eyelids; from the latin word palpebra meaning eyelid, really no help at all remembering (pal = to touch, and I guess the eyelids are sort of like bras... in that they cup the eye, keep things from touching the eye, etc)
Lacrimal caruncle: the pink spot at the medial corner of the eye that I try to remember to draw and has sweat/oil glands that form sleep when you wake up; from the Latin caruncula meaning wart lmao please no not near my eyes (I prob should've studied latin in college as my foreign language so all this terminology would be easier to grasp /o\ Instead of, you know, don't fall a"sleep" in your "uncle"s "car" or something
Eyelashes: contain ciliary glands (modified sweat glands for lubrication; cilia are hair like extensions around cells for locomotion, and you sweat when you move) & tarsal glands (modified sebaceous glands; tarsals are toes, which also sort of look like a row of eyelashes, and they don't really get oily but they can stink like oil turns rancid)
Internal anatomy
The wall is made of three layers:
Fibrous layer = outermost dense avascular connective tissue, includes sclera (white) and cornea (clear)
Vascular layer = middle layer; contains choroid (supply blood and nutrients for the eye) near the back and is modified towards the front into the ciliary body (ciliary muscles change lens shape like cilia on cell is for movement, and also secretes aqueous humor so the eye doesn't shrivel up); the iris and pupil are at the very front of the eye
Sensory layer = innermost sensory layer is actually two layers of retina:
Pigmented layer = outer layer contains pigments that absorb light and prevent scattering in the eye, act as phagocytes for photoreceptor cell renewal, and store vitamin A for the photoreceptor cells. Think of Red for Leader! Keeps light under check and photoreceptors clean and happy!
Neural layer = inner layer containing rods and cones and all that wonderful vision stuff; at the back by the blind spot is the fovea centralis (central pit) that's almost entirely cones so this is where color vision reigns supreme
also I've got serious astigmatism asdflkjh
Free nerve endings --> least specialized (free!! do what you want /o/); pain and temperature
+ epidermal cells = Merkel disc & hair follicle receptors --> light touch
Tactile corpuscles --> hairless skin only (for skin w/ hair you have the follicle receptors); light touch
Bulbous corpuscles --> deep pressure, stretch (think of bulbous balloons, can stand a lot of pressure blowing into them and they stretch)
Lamellar corpuscles --> deep in dermis; first application of deep pressure and then the bulbous takes over; used for high frequency vibrations (lamellar is like thin sheets of stuff, like laminated paper that you wave around and it makes that cool vibrating sound lmao)
Visual System a.k.a. YOU MISSED YOU CHANCE AT DISSECTING A COW EYE ASLFDKJH
Lacrimal apparatus (now every time you cry you can think about anat and cry even more :x):
Lacrimal gland (tears are actually stored above and lateral to the eyeball so they can flush things off the surface)
--> Lacrimal puncta (puncta = points, you can see this if you pull back the bottom eyelid and look medial for that little hole)
--> Lacrimal canaliculi (water is carried through a canal)
--> lacrimal sac (collects tears)
--> nasolacrimal duct (SNOT EVERYWHERE, this is why your nose runs when you cry)
Eye structures
Palpebrae: eyelids; from the latin word palpebra meaning eyelid, really no help at all remembering (pal = to touch, and I guess the eyelids are sort of like bras... in that they cup the eye, keep things from touching the eye, etc)
Lacrimal caruncle: the pink spot at the medial corner of the eye that I try to remember to draw and has sweat/oil glands that form sleep when you wake up; from the Latin caruncula meaning wart lmao please no not near my eyes (I prob should've studied latin in college as my foreign language so all this terminology would be easier to grasp /o\ Instead of, you know, don't fall a"sleep" in your "uncle"s "car" or something
Eyelashes: contain ciliary glands (modified sweat glands for lubrication; cilia are hair like extensions around cells for locomotion, and you sweat when you move) & tarsal glands (modified sebaceous glands; tarsals are toes, which also sort of look like a row of eyelashes, and they don't really get oily but they can stink like oil turns rancid)
Internal anatomy
The wall is made of three layers:
Fibrous layer = outermost dense avascular connective tissue, includes sclera (white) and cornea (clear)
Vascular layer = middle layer; contains choroid (supply blood and nutrients for the eye) near the back and is modified towards the front into the ciliary body (ciliary muscles change lens shape like cilia on cell is for movement, and also secretes aqueous humor so the eye doesn't shrivel up); the iris and pupil are at the very front of the eye
Sensory layer = innermost sensory layer is actually two layers of retina:
Pigmented layer = outer layer contains pigments that absorb light and prevent scattering in the eye, act as phagocytes for photoreceptor cell renewal, and store vitamin A for the photoreceptor cells. Think of Red for Leader! Keeps light under check and photoreceptors clean and happy!
Neural layer = inner layer containing rods and cones and all that wonderful vision stuff; at the back by the blind spot is the fovea centralis (central pit) that's almost entirely cones so this is where color vision reigns supreme
also I've got serious astigmatism asdflkjh