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Histology - Vasculature Part 2

Anatomy and Physiology20 CardsCreated about 1 month ago

This flashcard deck covers key concepts related to vasculature, including types of veins and arteries, fetal circulation, and the development of the heart.

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Relatively wide, irregular lumen, thinner walls, valves and no internal elastic lamina.

Medium vein (MV)
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Key Terms

Term
Definition
Relatively wide, irregular lumen, thinner walls, valves and no internal elastic lamina.
Medium vein (MV)
Arranged in networks. Consist of endothelial cells, basal lamina, and pericytes.
Capillaries
Blood flow into the right atrium from the IVC to the left atrium, bypassing pulmonary circulation.
Foramen ovale
are the nerves of the sixth pharyngeal arch, right and left that emerge from the vagus nerve at the level of the arch of aorta, and then travel up the side of the trachea to the larynx.
Recurrent laryngeal nerve
Constriction distal to ductus ateriosus. Separation of arterial circulation of Head/Upper trunk/UE from that of the Lower trunk/LEs that cannot be compensated for by the ductus arteriosus. Before birth have to develop extensive collateral circulation to bypass the narrowed aortic region and supply the lower trunk/LEs.
Postductal coarctation of the aorta
Continuous (type I), Fenestrated (type II), Sinusoidal (or discontinuous)
types of capillaries
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Histology - Vasculature Part 2
TermDefinition
Relatively wide, irregular lumen, thinner walls, valves and no internal elastic lamina.
Medium vein (MV)
Arranged in networks. Consist of endothelial cells, basal lamina, and pericytes.
Capillaries
Blood flow into the right atrium from the IVC to the left atrium, bypassing pulmonary circulation.
Foramen ovale
are the nerves of the sixth pharyngeal arch, right and left that emerge from the vagus nerve at the level of the arch of aorta, and then travel up the side of the trachea to the larynx.
Recurrent laryngeal nerve
Constriction distal to ductus ateriosus. Separation of arterial circulation of Head/Upper trunk/UE from that of the Lower trunk/LEs that cannot be compensated for by the ductus arteriosus. Before birth have to develop extensive collateral circulation to bypass the narrowed aortic region and supply the lower trunk/LEs.
Postductal coarctation of the aorta
Continuous (type I), Fenestrated (type II), Sinusoidal (or discontinuous)
types of capillaries
Modified cardiac muscle fibers, located in subendoCARDial, (not epithelial). Large pale-looking (“moth-eaten) cells.
Purkinje Fibers
Function: Regulation of regional blood flow (distribution). Examples: Axillary artery, Internal thoracic artery, Intercostal arteries
Muscular (distributing) arteries examples and functions
Relatively small, regularly shaped lumen, thick walls with internal elastic lamina
Muscular artery (MA)
The lungs are not oxygenating fetal blood. They need just enough blood to sustain.
Pulmonary bypass
Master gene required for the formation and development of the primary heart field
NKX-2.5
Tunica intima
Site of Atherosclerotic Plaque Formation
Blood to/from fetus to/from yolk sac
Vitelline arteries and arteries
sprouting of new vessels from existing vessels
Angiogenesis
Large irregular lumen. Discontinuous basal lamina. Found in Bone marrow, liver, spleen (sites of fluid & cell migration in & out of BV).
Sinusoidal (discontinuous) capillary
NKX-2.5 expression in visceral mesoderm (PHF)
BMPs + C & C cause
Venous blood from fetus back to heart
Cardinal veins
1. Cardiac myoblasts 2. Angioblasts
PHF cells induced to form
(initially 2-fuse to form 1), Blood from heart to body, YS, Placenta
Dorsal aorta
Secreted by neural tube, inhibitory to cardiogenesis.
WNT proteins