Histology lab 4: Feb. 8–9, 2005

Integumentary, Circulatory and Immune Systems


collection
slide
label
description
Integument
Integum/Respiratory 3130 Dogfish skin: w.m. denticles
Integum/Respiratory 3131 Dogfish skin: v.s. dermal papilla under denticle
Integum/Respiratory 7015 Human skin negro: v.s. thin, pigment granules in epidermis, strata of epidermis (corneum, spinosum, basale); also arteries, arterioles, veins and venules: arterioles: internal elastic lamina corrugated; tunica media: entirely smooth muscle (6 or less layers in large arterioles; two to three layers in small arterioles); tunica adventitia: no external elastic lamina; merges with surrounding tissue; veins: adventitia larger than media; flaccid, likely to contain blood; valves: venules:  capillary loops: meta-arterioles; lymphatic vessels resemble veins but lack blood cells entirely
Integum/Respiratory 7018 Human scalp white: v.s. thin, strata of epidermis; eccrine sweat glands, myoepithelial cells,  hair follicles; root, bulb, matrix, dermal papilla (of hair follicle), shaft, internal root sheath, external root sheath, connective tissue sheath (glassy membrane); sebaceous glands, arrector pili; also arterioles and venules (same as above)
Integum/Respiratory 7034 Axillary Skin human: sec thin, strata of epidermis, hair follicles, apocrine & eccrine sweat glands, myoepithelial cells; also arterioles and venules (same as above)
Integum/Respiratory 8475 lip primate: sec hairy side: strata of epidermis, hair follicles, sebaceous glands, arrector pili; also arterioles and venules (same as above)
Integum/Respiratory 8678 Nipple Primate: L.S. apocrine sweat glands, thin glabrous epidermis, strata of epidermis; also arterioles and venules (same as above)
Integum/Respiratory 8685 Eyelid primate: sec thin, strata of epidermis, hair follicles; conjunctiva; also arterioles and venules (same as above)
Integum/Respiratory 8280 Meissner's Corpuscles Prim. sec thick (glabrous), strata of epidermis (corneum, granulosum spinosum, basale), dermis, papillary layer, reticular layer; also arterioles and venules (same as above)
Circulatory System    
 Integum/Respiratory
8670
Lung primate: sec
pulmonary 'elastic' arteries; pulmonary veins
Epi/mus 3513
Muscle composite: sec
Cardiac muscle: tunica media = myocardium; intercalated discs
Epi/Mus
3527
Cardiac muscle: thin sect: IH.
tunica media = myocardium; intercalated discs
tunica intima = endocardium; endothelium
Epi/mus 3533 Heart Purkinje fibers: sec tunica media = myocardium; intercalated discs
tunica intima = endocardium; endothelium; conducting (Purkinge) fibers = conduction myofibers
Epi/mus 4059 Heart rat:c.s. tunica externa = epicardium; subepicardial connective tissue
tunica media = myocardium; intercalated discs; perimysium septa; papillary muscle
tunica intima = endocardium; endothelium
Circ/Hemato 4022
Artery mammal: c.s.
tunica externa; vasa vasorum; look for an external elastic lamina: can you find one?
tunica media
tunica intima: subendothelial connective tissue; look for an internal elastic lamina: is it complete? endothelium
Circ/Hemato 4040 Capillaries mammal don't let 'em fool ya! they're small! only about the diameter of an erythrocyte wrapped up in an endothelial cell. Continuous capillary: no internal or external elastic laminae; no tunica media or externa.
For fenestrated capillary
see pancreas, villi of small intestine and glomeruli of kidney.
For sinusoidal (discontinuous capillary
see liver, spleen, lymph nodes, bone marrow or suprarenal cortex.
Circ/Hemato
4094
Lymph vessel valve: W.M.
Can you tell which direction lymph flowed through valve?
Circ/Hemato  6510 aorta elastic: elastic tissue stain tunica adventitia; vasa vasorum; no discrete external elastic lamina
tunica media: concentric fenestrated elastin sheets, collagenous bundles, some smooth muscle, vasa vasorum
tunica intima; subendothelial connective tissue, internal elastic lamina incomplete, endothelium
Circ/Hemato  6516 Artery human: c.s. tunica adventitia; vasa vasorum; look for external elastic lamina
tunica media: thick, circumferential layers of smooth muscle
tunica intima: subendothelial connective tissue, look for internal elastic lamina, endothelium
Circ/Hemato
8354
Vein primate: sec large muscular vein: vein collapsed—no blood
tunica adventitia; vasa vasorum
tunica media: vague layers contracted smooth muscle; vasa vasorum
tunica intima: subendothelial connective tissue, endothelium

Immune System

 
collection slide # label description
Circ/Hemato 1900 or 6555
Palatine tonsil
tonsillar crypt; stratified squamous epithelium; lymphatic nodules (vague)
CT 3236 Reticular tissue thin sec M & NFR stroma: cortex: circular profiles near periphery encapsulate lymphatic nodules
Circ/Hemato 4094 Lymph vessel valve: W.M. what is the direction of lymph flow?
Circ/Hemato 4104 or 8375 Lymph Node: sec Nodes have nodules! Capsule: afferent lymphatics with valves; subcapsular (marginal) sinus; trabeculae (internodular); trabecular sinuses; cortex: lymphatic nodules; germinal center; lg (mitotic) lymphocytes (lymphoblasts); peripheral zone (corona), sm. lymphocytes plasma cells; central (eccentric) arteriole; sinuses; postcapillary or high endothelial venules; paracortex; medulla; medullary cords; medullary sinuses
Circ/Hemato 4130 Spleen: sec White pulp: periarteriolar lymphatic sheath (PALS), central artery (white pulp artery), lymphatic nodules, germinal region, mitotic figures, lg. lymphocytes (lymphoblasts),  peripheral (corona) region, plasma cells, central artery (eccentric arteriole) ; marginal zone (or peripheral white pulp); penicillar arterioles (some with 'sheath') = spleenic (red) pulp arteries; Red (spleenic) pulp: spleenic cords (Billroth's), venus sinuses (sinusoids).
Dig. Sys 4534 or 4102 Ileum (aggregated lymph nodules): c.s. aggregated lymphatic nodules (Peyer's patches) covered by specialized epithelium (M cells)
Circ/Hemato 6628 or 6630 Thymus human infant or adult: sec Stroma: capsule, trabeculae; cortex: t lymphocytes epithelial reticular cells, thymic (Hassall's) corpuscles; medulla, adipocytes
Dig Sys
6787
Appendix human: c.s.
lymphatic follicles or nodules in submucosa (germinal centers may be indistinct); intestinal epithelium infiltrated by lymphocytes

Last Updated: Nov. 22, 2004
E-Mail Address: sshostak+@pitt.edu