Blood is moved through the vascular system by
a. valves in the wall of the blood vessels.
b. peristalsis caused by smooth muscle in the blood vessel walls.
c. pressure gradients created by the heart.
d. osmotic pressure.
e viscosity of the blood

Blood is moved through the vascular system by pressure gradients created by the heart.

answer: national resource conservation services

national resource conservation services is the us. based approach that provides technical and financial assistance for natural resource management. nrcs society in conservation of resources by involving in activities like farmland protection, flood prevention, watershed protection, urban conservation, conserves economic and environmental conditions. it conducts soil surveys and implements the policy of natural resources management on the society.

c. establishing proper sleep hygiene