What walk the heart Do?

The heart is a pump, normally beating about 60 to 100 times every minute. With each heartbeat, the heart sends blood throughout our bodies, transferring oxygen to every cell. After transferring the oxygen, the blood returns to the heart. The love then sends out the blood to the lungs to pick up much more oxygen. This bicycle repeats over and also over again.

You are watching: Which statement about closed circulatory systems is false?

What does the Circulatory device Do?

The circulatory system is made up of blood ship that carry blood far from and towards the heart. Arteries carry blood away from the heart and also veins bring blood ago to the heart.

The circulatory mechanism carries oxygen, nutrients, and also hormonesto cells, and also removes garbage products, prefer carbon dioxide. These streets travel in one direction only, to save things going wherein they should.

What space the parts of the Heart?

The heart has four chambers — two on top and also two top top bottom:


The atria room separated indigenous the ventricles by the atrioventricular valves:

The tricuspid valve off the appropriate atrium from the appropriate ventricle. The mitral valve the end the left atrium native the left ventricle.

Two valves additionally separate the ventricles native the huge blood vessels that carry blood leaving the heart:

The pulmonic valve is in between the appropriate ventricle and the pulmonary artery, i beg your pardon carries blood come the lungs. The aortic valve is between the left ventricle and also the aorta, which carries blood to the body.

What are the parts of the Circulatory System?

Two pathways come indigenous the heart:

The pulmonary circulation is a short loop from the love to the lungs and ago again. The systemic circulation dead blood native the heart to every the various other parts of the body and ago again.

In pulmonary circulation:

The pulmonary artery is a huge artery that comes from the heart. It splits right into two main branches, and brings blood native the heart to the lungs. In ~ the lungs, the blood choose up oxygen and also drops turn off carbon dioxide. The blood then returns to the heart v the pulmonary veins.

In systemic circulation:

How go the heart Beat?

The heart it s okay messages from the body the tell it once to pump an ext or less blood depending on a person"s needs. Because that example, when you"re sleeping, that pumps just enough to provide for the lower quantities of oxygen needed by your body in ~ rest. However when you"re exercising, the heart pumps much faster so that your muscles get much more oxygen and can job-related harder.

How the love beats is managed by a mechanism of electric signals in the heart. The sinus (or sinoatrial) node is a little area of organization in the wall surface of the ideal atrium. It sends out an electric signal to begin the contracting (pumping) of the love muscle. This node is called the pacemaker of the heart because it to adjust the price of the heartbeat and causes the rest of the heart to contract in that is rhythm.

These electric impulses do the atria contract first. Then the impulses travel down come the atrioventricular (or AV) node, i m sorry acts as a kind of relay station. From here, the electrical signal travels with the right and also left ventricles, making castle contract.

See more: Calculate The Angular Acceleration As A Function Of Time., Tangential Acceleration Formula

One complete heartbeat is consisted of of two phases:

The first phase is called systole(pronounced: SISS-tuh-lee). This is once the ventricles contract and also pump blood into the aorta and also pulmonary artery. During systole, the atrioventricular valves close, developing the first sound (the lub) of a heartbeat. Once the atrioventricular valves close, it keeps the blood native going back up into the atria. Throughout this time, the aortic and pulmonary valves are open to enable blood right into the aorta and pulmonary artery. Once the ventricles complete contracting, the aortic and also pulmonary valves near to stop blood indigenous flowing earlier into the ventricles. These valves closeup of the door is what creates the 2nd sound (the dub) of a heartbeat. The 2nd phase is referred to as diastole(pronounced: die-AS-tuh-lee). This is once the atrioventricular valves open and also the ventricles relax. This allows the ventricles come fill v blood from the atria, and also get ready for the next heartbeat.

How have the right to I aid Keep My love Healthy?

To aid keep her heart healthy:

acquire plenty of exercise. Eat a nutritious diet. walk for regular medical checkups. Phone call the doctor about any family background of love problems.

Let the doctor know if friend have any kind of chest pain, problem breathing, or bright or fainting spells; or if you feel like your heart occasionally goes really fast or skips a beat.