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The heart is just a muscle that pumps blood through the body. When the heart contracts it is pushing the blood around your body. There is a nice, though not too in depth, video on the NOVA website:
See the Related Link.
Wiki User
∙ 14y ago
Wiki User
∙ 15y agothe heart is contracting and expanding rhythmically to push blood through your body. The actual heart beat sounds (lub dub) that you hear are the heart valves closing so that blood is only pushed forward when the heart contracts, and not backward
Wiki User
∙ 13y agoWhen the heart contracts it pushes blood out of the left Ventricle throughout the Aorta around the body. It pushes with such force it can circulate the whole body in 23 seconds.
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What happens when the ventricle contracts?
Heart pumps out blood into major vessels(aorta,pulmonary arteries)
What happens to the tricuspid and miltral valves when the heart contracts?
they open to allow the blood through then close again so the blood can't flow back
How does the heart contract or relax?
The heart contracts and relaxes during a cardiac cycle.
When the heart contracts it produces a wave of fluid pressure in the?
arteries
Term for the number of times you heart contracts in one minute?
Contractions,or beats .
What happens to the heart when an action potential is generated in the SA node?
it contracts
What happens in the left ventricle of the heart?
It contracts to push blood throughout the body.
What happens when the ventricle contracts?
Heart pumps out blood into major vessels(aorta,pulmonary arteries)
What is it called when your heart contracts and relaxes?
Diastolic and systolic is when your heart contracts and relaxes.
What happens if the chordae tendineae is nonfunctional or defective?
the valve would fail to close or would invert when the heart contracts, this may cause heart failure.
What is the time of recovery before the heart contracts again?
Timer for recovery before the heart contracts again
What happens when the biceps muscle contracts?
When the bicep contracts the triceps relax
What happens when the deltoid contracts concentrically?
When the Deltoid contracts the humerus abducts.
Where does blood flow when the ventricle contracts?
Blood flows to the heart when the ventricle contracts
What is the organ that relaxes and contracts?
heart
What happens when ventricales contracts?
When the left and right ventricles of the heart contract, blood is pumped to the rest of the body and when they are relaxed they are filling with blood received from the atriums.
What happens to the tricuspid and miltral valves when the heart contracts?
they open to allow the blood through then close again so the blood can't flow back
