it moves through the veins.
Not really - the sequence is
right atrium
right ventricle
to and from lungs
left atrium
left ventricle
to the body
Heart (Left Ventricle) -> Arteries -> Arterioles -> Capillaries -> Venules -> Veins -> Heart (Right Atrium)
No they do not. "Veins" are in fact, the blood vessel that moves blood to the heart so that it can get moved to the lungs in order to gain oxygen. "Arteries" are the blood vessel that moves blood away from the heart so that way the various body parts can gain that oxygen to do there thing.
Blood enters the heart from the systemic circulation in the right atrium, and then moves to the right ventricle. From there, blood is pumped into the pulmonary circulation. When the blood returns from the lungs, it enters the left atrium, then left ventricle, then is pumped to body tissues via the systemic circulation.
'c' heart pumps oxygen rich blood, 'a' oxygen rich blood arrives at capillaries, 'd' oxygen moves through capillary walls, 'b' oxygen enters body cells.
larger blood vessels called veins which carry the blood back to the heart
Artery walls are muscular allowing the artery to constrict or expand as need be in order to control blood pressure. The blood in arteries is under direct pressure from the heart. Veins contain small little valves so that the blood can only flow in the direction of the heart. Venous blood is under little pressure and relies on these little valves to get the blood back to the heart. As the body moves, this also helps move venous blood along.
Arterioles carry blood in the direction away from the heart. The order of vessels from the heart is: arteries>arterioles>capillaries>venules>veins.
While exercising, your muscles need more oxygen in order to create more energy through cellular respiration. In order to supply more oxygen, the heart beats faster so blood moves faster throughout the body.Because the muscles need more blood i them Because your muscles require more oxygen which is delivered to them through the blood stream, which is pumped to them by the heart, so the heart beats to kep up with the demand.
Because the heart itself needs a blood supply in order to function. If the heart is starved of its own blood - it will stop.
your heart beats faster in order to supply more blood to the body
chicken to bock
myocardium