how does the inferior venacava bring blood from the inferior parts of the body against the force of gravity and also how does the aorta take oxygenated blood to the posterior parts of the body?
Answers
Answer:calf muscles of lower limb helps to return venous blood & intertial fluid to the upright of the body
It is also called as second heart of the body
Explanation:
When a person is lying down, there is a minimal gravitational influence on the blood in the body, so adequate venous return can be ensured by low levels of venous pressure. However, when sitting or standing upright, the venous blood in our lower limbs must be returned to the heart against the force of gravity, requiring pressures well above the usual pressures in the veins.
the human body relies on skeletal muscle pumping to return pooled venous blood, as well as interstitial fluid, back to the heart. Three lower limb skeletal muscle pumps exist, the foot pump, the calf muscle pump, and the thigh pump. The foot pump serves primarily to "prime" the calf muscle pump, which provides about three-quarters of the fluid return from the lower body to the heart, while the thigh pump provides the remaining quarter.