Hemostasis is the name of the response to broken blood vessels. This response occurs when blood ruptures or leaks out of the body's vessels. The body reacts with a vascular plugging effect that clogs the leakage of the blood vessel.
the bodies immune system tells the white blood cells to attack enemy bacteria (etc.) as the first response to the immune system's defense
(The response that the immune system displays when first exposed to an antigen.) (medical-dictionary.thefreedictionary.com/primary+response)
Walter Cannon, a harvard physiologist, first investigated the fight or flight response in 1927.
the Challenger
It never 'receives' blood. It makes its own. In humans the first red blood cells show up at the end if the first month.
Hemostasis is the name of the response to broken blood vessels. This response occurs when blood ruptures or leaks out of the body's vessels. The body reacts with a vascular plugging effect that clogs the leakage of the blood vessel.
Vascular spasm
I believe the first vessel is the pulmonary trunk which brings the deoxygenated blood to the pulmonary arteries and so on....
The aorta.
Pulmonary Vein
blood pressure increases hormones are released
blood pressure increases hormones are released
The story of how blood clots, is the story of rapid-fire reactions. The first step in the chain is some kind of injury to a blood vessel, that makes a rough spot in its lining. Normally the lining of a blood vessel is smooth. Almost immediately, damaged tissue cells in the injured blood vessel wall release certain clotting factors into the plasma. The factors rapidly react with other factors already present into the plasma to form prothrombin activator. At the same time this is happening, platlets become sticky at the point of injury and soon acculmalate near the opening in the broken blood vessel, formimg a soft, temporary platlet plug. as the platlets accumulate, they release addditonal clotting factors, formimg even more prothrombin activator.
First of all its "vessels" and second the purpose is to circulate blood all over the body because blood carries oxygen to the major organs and all that.
Platelets are the formed elements that have a role in blood clotting, and would seal an injury to a vessel walls. The platelets are cell fragments. Platelets are also known as thrombocytes.
The endothelial lining is damaged, exposing collagen proteins to the blood.
The blood cells containing hemoglobin, an iron-containing protein that transports oxygen, are called