Heart

Because it is the central organ of the body, like a nucleous, it helps with the functions of the brain by pumping blood to your body allowing them to recieve oxygen, then helps your body to move.

The heart is oxygenated by capillaries surrounding it just like every other organ

Semilunar valves include the aortic and pulmonary valves of the Heart. These valves do not have chordae tendineae, and are more similar to the valves in veins. Tricuspid vales are composed to three cusps which are attached with papillary muscles with the help of chordae tendineae.

The right side of the heart as venous blood. The right atrium fills with venous blood and the Right ventricle pumps the de-oxygenated blood to the lungs via the pulmonary arteries. Then the re-oxygenated blood pools into the Left atrium vi the pulmonary vein and then the left ventricle is responsible for pumping the blood throughout the body.

Interventricular septum

Ependymal cells

The left side

60-90 beats per minute (bpm). Depending on how much you weigh, how much you exercise, and what you eat, bmp could vary.

The heart rate is controlled by the opposing actions of sympathetic and parasympathetic nerves and by the action of epinephrine released from the adrenal gland. Norepinephrine, released by sympathetic nerves in the heart, and epinephrine, released by the adrenal gland, increase the heart rate, while acetylcholine, released from parasympathetic nerves, decreases

It allows atria complete their contraction and force all blood into ventricles. Also I think it ensures that the electrical signal travels down to the apex at once so that all the the myocardial contractile cells in the ventricle depolarize in a short time so that they contract insync.

systolic pressure

The ventricles of the heart are most commonly known; there are ventricles in the brain, however.

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The heart is constantly active muscle that contracts, relaxes and pumps blood. It is necessary for it to be elastic so that it can retain it shape and still be flexible enough to allow for the contractions, relaxation, and pumping.

The right side of the blood receives deoxygenated blood from the systemic (body) circulation. The right atrium receives blood from the systemic veins and pumps it into the right ventricle. At that point, the right ventricle pumps that blood to the lungs.

Viral infections such as HIV can definitely affect and weaken the heart.

Pumping blood in and out of it and all so helping you breathe in fresh air and breathing out Carbon Dioxide.

so they can purified the air the goes into the heart

There are many section in the heart, starting with:

The Superior Vena Cava, where de-oxygenated blood flows in from the body. From there the blood flows into the Right Atrium, through the Tricuspid Valve and into the Right Ventricle. After the blood is in the Right Ventricle, the blood flows out of the heart through the Inferior Vena Cava and in to the lungs, where it can be oxygenated. Once oxygenated, the blood flows back into the heart through the Pulmonary Artery. From the Pulmonary Artery the blood flows into the Left Atrium, through the Mitral Valve and into the Left Ventricle. From there the blood flows through the Pulmonary Valve to the Aorta and out into the body. The process then starts over from there.

Heart rate increases with sympathetic nervous system. There is increase in stroke volume and cardiac output. With stimulation of vagus nerve or parasympathetic nervous system, You have decrease in heart rate. There is decrease the stroke volume and cardiac output.

septum

listen to the 'pump your blood song' it helps!

remember 'always try before you buy' to remember that the tricuspid valve becomes before the bicuspid valve'

'a's go with v's and v's go with a's'..

arteries always arise from ventricles

veins always enter the atria

It is an organ. The heart belongs to cardio-vasculary organ system.

Yes, the heart is a two part pump. The right side of the heart receives deoxygenated blood from the body and pumps it to the lungs. The left side of the heart receives oxygenated blood from the lungs and pumps it to the body.

The tendons you are talking about are called the cordae tendineae not heart strings