心血管与呼吸精品教学（汕头大学）心血管系统组织学（组培学）.pptxVIP

;Histology of Circulatory System;Cardiovascular/blood circulatory system：; On studying this chapter, you should be better to understand: The histological organization of the heart; The events that result in a heartbeat; Different kinds of blood vessels in routine section; Microstructure of 3 kinds of capillaries. ;;endothelium: ;endothelia: ;Endothelia and neoangiogenesis ;neoangiogenesis and tumor;;Tunica intima: thick, internal elastic membrane is not prominent Tunica media:  40-70 layers of elastic membrane, some muscles and fibroblasts Tunica adventitia:  thin, connective tissue, vasa vasorum ;Elastic van Gieson; Tunica intima: conspicuous wavy pink refractile internal elastic membrane Tunica media: 10-40 layers of smooth muscles Tunica adventitia:  consists chiefly of elastic fibers, together with some collagen vasa vasorum, lymphatics;HE stain; ： endothelium ： subendothelium ： internal elastic membrane; endothelium + basement membrane + internal elastic membrane 3-4 layers of smooth muscle，also called muscular artery no external elastic membrane ; small artery; arteriole; larger diameter, thin collapsed walls; no internal and external elastic membrane, so the boundaries between 3 tunica are not so clear as in artery; contains more connective tissue, less smooth muscle; ?vein valve: ;;Vein valves: Bag-like protrusion of tunica intima, which prevents the blood flow from running to opposite direction. Exists only in the vein that has low position or far away from heart.;Muscle contraction promotes the blood flowing in veins.;;Medium-sized vein:; precapillary true capillary arteriole thoroughfare channel venule arteriovenous anstomosis ; endothelium: basement membrane: pericyte: ; the longitudinal and cross section of capillary ;pericyte: ;Capillaries under EM;;; endocardium and myocardium; epicardium; sinoatrial(SA) no