MICROANATOMY

Detailed explanation-1: -During exercise, the cardiovascular system redistributes the blood so that more of it goes to the working muscles and less of it goes to other body organs such as the digestive system. This redirection of blood flow is caused by a mechanism (or process) called the vascular shunt mechanism.

Detailed explanation-2: -Vascular shunting is the process of redistribution of blood. Blood diverted to active areas and diverted away from inactive areas. Occurs through vasoconstriction (narrowing of arteries) and vasodilation (widening of arteries). Active areas during exercise = brain and working muscles.

Detailed explanation-3: -The purpose of veins in the cardio-vascular system are to transport deoxygenated blood back to the heart (1). They have thin walls and have valves to stop the backflow of blood (2). The cardio-vascular system redistributes blood around the body in two ways. One was is through vasodilation (1).

Detailed explanation-4: -Pulmonary circulation – circuit between the heart and lungs to get the blood re-oxygenated. Systemic circulation – circuit between heart and the muscles (and other tissues). Transports oxygen to muscles for energy. There are major types of blood vessels: arteries, arterioles, capillaries, venules and veins.

Detailed explanation-5: -Definition. Pulmonary blood flow redistribution refers to any departure from the normal distribution of blood flow in the lungs that is caused by an increase in pulmonary vascular resistance elsewhere in the pulmonary vascular bed.