(The tissues surrounding blood vessels) involved in Hemostasis when local vessel is injured.

It playsa part in Hemostasis by providing back-pressure on the injured vessel through swelling and trapping of escaped blood.

(The blood vessels through which blood flow) it depends on the size, amount, of smooth muscle within their walls and integrity of the endothelial cell lining.

clot or thrombus formation

clot or thrombus dissolution

Primary Test:

Secondary test:

These processes ultimately lead to the formation of a stable fibrin-platelet plug at the site of injury and the initiation of ___

Inner layer composed of endothelial cells that provide a smooth, frictionless surface for blood flow.

regulates blood vessel function by releasing nitric oxide and endothelin, which control vasodilation and vasoconstriction.

Middle layer

composed of smooth muscle and elastic fibers; controls vasoconstriction and vasodilation.

Outer layer

provides structural support and protection to blood vessels.

Internal elastic lamina composed of elastin and collagen

Collagen and fibroblasts in veins

Collagen, fibroblasts, and smooth muscle cells in arteries

Endothelial cells (endothelium)

Controlled by vessel smooth muscle; enhanced by chemicals secreted by platelet

Interaction and adhesion of platelets to one another to form initial platelet plug at injury site.

Adhesion to exposed subendothelial connective tissue

Coagulation factors interact on platelet surface to produce fibrin; fibrin platelet plug then forms at site of vessel injury

Fibrin clot must be stabilized by FXIII

(The platelets and plasma proteins that circulate within the blood vessels)