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Histology Ch. 11-12
Circulatory System and blood
20
Biology
Undergraduate 4
11/12/2015

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Term
Primary aggregation (of thrombocytes)
Definition

in wound healing, disruption of endothelium exposing collagen

platelet plug is formed by adhering to collagen

Term
Secondary Aggregation (in thrombocytes)
Definition

release adhesive glycoprotein and ADP

Increases size of plug

Term
Blood Coagulation
Definition
Fibrinogen form  fibrin polymer and forms CLOT OR THROMBUS
Term
Clot retraction  and removal
Definition

clot bulges  and contracts slightly

Endothelium is repaired, and clot is removed by PLASMIN

Term
What removes a clot?
Definition
plasmin, formed through plasminogen activators from plasminogen in plasma
Term
2 major parts of circulatory
Definition
pulmonary and systemic (brings nutrients and removes waste)
Term
Ventricles
Definition
Right to lung, left to whats left
Term
atria
Definition
right from body, left from lung
Term
Three layers of heart chambers
Definition
endocardium, myocardium, and epicardium
Term
Sinoatrial node
Definition
pacemaker
Term
Purkinje Fibers
Definition
AV bundle at the apex of the heart, larger than adjacent contractile muscle fibers
Term
Growth Factors
Definition
VEGF and angiopoietins
Term
VEGF
Definition
stimulates formation of the vascular system from embryonic mesenchyme (vasculogenesis, and angiogenesis)
Term
Angiopoietins
Definition
stimulate endothelial cells to recruit smooth muscle cells and fibroblasts
Term
Three layers in walls of large vessels
Definition
Intima, media, and the adventitia
Term
Blood flow Systole
Definition
Ventricular contraction, blood moved through arteries
Term
blood flow diastole
Definition
Ventricles relax, maintains arterial pressure
Term
Arterioles
Definition
smallest arteries, beginning of the microvasculature
Term
Percent of capillaries empty at any given time
Definition
95%
Term
Does not contain red blood cells
Definition
lymphatic vascular system
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