Histology Lab Exam 3
About this deck
By: Ken Lim
Created: 2011-11-27
Size: 46 flashcards
Views: 58
Created: 2011-11-27
Size: 46 flashcards
Views: 58
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-Lymph nodes - a conglomeration of lymphocytes with a white germinal center with other lymphocytes surrounding it.
-Held together by reticular fibers.
-Lymph node (low power)
-Subcapsular sinus (Darker purple portion surrounding the medulla)
-Efferent lymphatic vessels (left of medulla) - located in concave portion of the lymph node
-Veins have blood cells inside of them
-Artery located at bottom and surrounded by connective tissue
Subcapsular sinus
-Afferent vessels drain into the subcapsular sinus
-pg. 194 - Afferent lymphatic vessels penetrate the capsule to enter narrow spaces (Subcapsular sinus)
Germinal Center
-Germinal center - the lighter-stained interior area of lymph node. The active sites of lymphocyte proliferation.
-Surrounded by subcapsular sinus.
-Trabeculae connective tissue - dark staining, top right. Surrounds the subcapsular sinus.
-The capsule is outside of the trabeculae connective tissue.
Germinal center (higher power)
-Lymphocytes - darker cells
-Reticulocytes - bigger cells
Afferent lymph node
Reticular fibers
Spleen
-Heavily involved in platelet production
-Dense red pulp material containing the venous sinusoids, which are only present in the spleen.
-Venous sinusoids - composed of leaky veins and capillaries and expose the marrow to dead red blood cells
-White pulp - Lymphatic nodules in the spleen
Outside of Spleen
-White spaces - sinusoids or splenic cords
Red pulp
-Red pulp contains the splenic cords and venous sinuses that course between the cords.
Sinusoid
-In RED PULP of the Spleen, Venous Sinuses are dilated vessels lined with modified endothelium of elongated cells that appear cuboidal.
White pulp
-In spleen (lymphatic nodules of spleen)
Thymus
-Can distinguish Thymus by the lobular structure.
-Hassall's Corpuscle - The big pink round things. Have unknown function. Located in medulla of thymus.
Thymus
-Hassall's Corpuscle - The big pink round things. Have unknown function. Located in medulla of thymus.
Thymus
-Hassall's Corpuscles - The big pink round things. Have unknown function.
-Hassall's Corpuscles - oval structures consisting of round/spherical whorls of flattened epithelial cells.
Lymphocytes (developing and maturing lymphocytes)
-Reticulocytes - the bigger cells
Aorta
-Tunica intima - innermost layer when viewed in cross-section. Layer in contact with the blood.
-Tunica media - middle layer. Layer closest to muscle.
-Tunica adventitia - aka tunica externa, outermost layer, has endothelial cells lining the vessel
Artery (or aorta?) zoomed in
Large blood vessel
-Endothelium - in contact with blood
-Subendothelium - connective tissue layer
-An internal elastic membrane.
-Most of the large blood vessel is muscle.
Aorta
Artery and vein
-Artery to the right
-Tunica intima - innermost layer when viewed in cross-section. Layer in contact with the blood.
-Tunica media - middle layer. Layer closest to muscle.
-Tunica adventitia - aka tunica externa, outermost layer, has endothelial cells lining the vessel
Muscle layer in vein
Artery (circular one) and vein
-Vaso vasorum - blood vessels surrounding the artery and vein. The empty white circular cells in tunica adventitia.
-Vaso vasorum - The blood vessels in the tunica adventitia of arteries (blood vessels of the blood vessel)
Arteriole (circular one on left) - have a thin internal elastic lamina and a layer of smooth muscle fibers in the tunica media.
Venule (upper right oval)
Arteriole
Capillaries
Capillary (picture on the right with a single red blood cell within it)
-Lymphatic cell (on left)/lymphatic vessel?? - characterized by having thinnest walls
Skeletal muscle
-Each circle is an individual muscle fiber
Skeletal muscle fibers
-Bundle of muscle fibers highlighting the Perimysium and Endomysium.
-Skeletal muscle fibers identified by the presence of the nucleus on the exterior of the individual fiber.
Longitudinal section of Skeletal Muscle
-Nuclei are on the outside part of the muscle fiber.
Striated muscle. Tendon at bottom.
-Tendon is the blue part, due to the trichrome stain
Cardiac muscle cells
-Intercalated disk - Dark heavy lines in the picture. Carr's pointing to it.
-Striated.
-Nuclei located in center of the muscle fiber
Cross section of Cardiac muscle.
-Nucleus in the middle of the muscle fiber.
Modified cardiac muscle with Purkinje cells
-Cells in the center are Purkinje cells that are in the process of evolving into a nerve cell.
-Purkinje cells have 2 nuceli, and are specialized for sending/receiving electrical impulses.
Skin (low power)
-Hypodermis is located at the bottom (contains fat)
-Dermis is the middle layer
-Epidermis is the top layer
-Epidermis is connected to the dermis via dermal papillae which look like projections into the epithelium.
Epidermis and dermis.
-Epidermis - top layer
-Dermis - bottom layer
-Epidermis and dermis connected via the dermal papillae
Epidermis layer showing the... (from top to bottom)
-Stratum corneum
-Stratum granulosum - consists of cells with keratin secretory granules. A darker shade.
-Stratum spinosum - Thick, main, lighter portion
-Stratum Basale- very bottom layer that is a little darker b/c of melanin pigment
Skin
-Layers =
1. Stratum corneum
2. Stratum granulosum
3. Stratum spinosum
4. Stratum basale
Dermal papillae of skin
-Meissner's corpuscle is a circular cellular structure located within the papillae
-Dermal papillae indent the underside of the epidermis. Prominent in thick skin.
Axon
-A small canal where the sensory signals are transmitted
Liver
-Triad with...
1. Portal vein
2. Bile duct
3. Hepatic arteries
Gallbladder
-Mucosal folds that resemble villi of the small intestine. However, the mucosal folds vary in size and shape and display an irregular arrangement.
Gallbladder
-Mucosal folds
Gallbladder
-Projections of the gall bladder
-pg. 323 - ??Might be the lamina propria of mucosal folds, or possibly an example of villi in small intestine.??
About this deck
By: Ken Lim
Created: 2011-11-27
Size: 46 flashcards
Views: 58
Created: 2011-11-27
Size: 46 flashcards
Views: 58
About StudyBlue
STUDYBLUE makes things that make you better at school.
Things like online flashcards with photos and audio.
Things like personalized quizzes and friendly reminders about when (and what) to study next.
Think of it as a digital backpack™: access to all of your study materials online and on your phone.
STUDYBLUE exists to make studying efficient and effective for every student, for free. Join us.
“I have used this website for three exams, and I see a huge difference in my test results.”
Naj
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