Question

the blood pressure in human body is Greater at the feet than at the brain.why

Answer 1

 The pressure of a liquid is given by the relation:

P = hρg

Where,

P = Pressure

h = Height of the liquid column

ρ = Density of the liquid

g = Acceleration due to the gravity

It can be inferred that pressure is directly proportional to height. Hence, the blood pressure in human vessels depends on the height of the blood column in the body. The height of the blood column is more at the feet than it is at the brain. Hence, the blood pressure at the feet is more than it is at the brain.

Answer 2

The blood pressure is higher at feet than brain, as the blood has to be pushed back to the heart from feet against the force of gravity for a large distance and in case of brain distance is less and force required is also less...

by biological view...

Our brain need a low pressure for its activities of about 50 to 70 mmHg. If pressure increases it results in cerebral tissue swelling which can be hazardous...