The, _____which are predominantly smooth muscle,

They act as control valves through which blood is released as it moves into the capillaries.

Changes in the activity of ______ fibers that innervate these vessels cause them to constrict or relax as needed to maintain blood pressure.

The venous system (veins) is a hige-pressure system that returns blood to the heart.

The _____ collect blood from the capillaries,

veins transport blood back to the ==➔________Vena Cava

the pressure in the left atrium is called the central venous pressure.

————anything that moves through the blood vessels until it reaches a vessel that is too small to let it pass. When this happens, the blood flow is stopped by the embolus.

An embolus is often a _____ piece of a blood clot that breaks off (thromboembolus)

Is a restriction in blood supply to tissues, causing a shortage of oxygen

It also means local anaemia

Ischemia comprises only insufficiency of oxygen,

Ischemia can be partial (poor perfusion) or total.

• Is tissue death

White infarctions (anemic infarcts)سؤال مهم

Red infarctions (haemorrhagic infarcts)
Generally affect the lungs or other loose organs ( ovary, small intestines)