Blood enters the aorta and pulmonary artery in a rapid spurt, but the tissues require blood to be delivered in an even flow- the structure of the artery walls plays a large part in creating an even flow- describe how.
Artery walls close to the heart have lots of elastic tissue. When blood leaves the heart, the artery walls stretch. As blood moves in and out of the aorta, the pressure begins to drop. The elastic recoil of the walls helps to maintain the blood pressure in the aorta. The further the blood flows along the arteries the more pressure drops and the fluctuations become less obvious.
