The Right Ventricle Transports Oxygenated Blood to the Lungs

What Does the Heart Practice?

The heart is a pump, usually chirapsia virtually 60 to 100 times per minute. With each heartbeat, the middle sends blood throughout our bodies, carrying oxygen to every jail cell. Later delivering the oxygen, the claret returns to the middle. The heart and then sends the claret to the lungs to pick upwardly more than oxygen. This bike repeats over and over once again.

What Does the Circulatory System Exercise?

The circulatory organisation is fabricated upwardly of blood vessels that comport blood away from and towards the centre.Arteries deport blood abroad from the middle andveins carry claret back to the heart.

The circulatory organization carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide. These roadways travel in one direction only, to go along things going where they should.

What Are the Parts of the Heart?

The heart has four chambers — ii on height and ii on bottom:

• The 2 bottom chambers are the right ventricle and the left ventricle. These pump blood out of the eye. A wall called the
  interventricular septum
  is between the 2 ventricles.
• The two top chambers are the right atrium and the left atrium. They receive the claret inbound the heart. A wall called the
  interatrial septum
  is betwixt the atria.

The atria are separated from the ventricles by the
atrioventricular valves:

• The
  tricuspid valve
  separates the right atrium from the right ventricle.
• The
  mitral valve
  separates the left atrium from the left ventricle.

Two valves also split the ventricles from the large blood vessels that carry blood leaving the center:

• The
  pulmonic valve
  is between the right ventricle and the pulmonary avenue, which carries blood to the lungs.
• The
  aortic valve
  is between the left ventricle and the aorta, which carries blood to the body.

What Are the Parts of the Circulatory Organisation?

Two pathways come from the heart:

• The
  pulmonary apportionment
  is a short loop from the heart to the lungs and back again.
• The
  systemic circulation
  carries claret from the heart to all the other parts of the body and back again.

In pulmonary circulation:

• The pulmonary artery is a large artery that comes from the heart. Information technology splits into ii main branches, and brings claret from the middle to the lungs. At the lungs, the claret picks up oxygen and drops off carbon dioxide. The blood and then returns to the center through the pulmonary veins.

In systemic circulation:

• Next, claret that returns to the heart has picked upward lots of oxygen from the lungs. So it tin now get out to the torso. The aorta is a big artery that leaves the heart carrying this oxygenated blood. Branches off of the aorta send blood to the muscles of the center itself, as well as all other parts of the torso. Similar a tree, the branches gets smaller and smaller as they get farther from the aorta.

  At each body part, a network of tiny blood vessels called
  capillaries
  connects the very small-scale artery branches to very small veins. The capillaries have very thin walls, and through them, nutrients and oxygen are delivered to the cells. Waste products are brought into the capillaries.

  Capillaries and then atomic number 82 into small-scale veins. Modest veins lead to larger and larger veins as the blood approaches the middle. Valves in the veins keep blood flowing in the correct management. 2 large veins that lead into the middle are the superior vena cava and inferior vena cava. (The terms superior and inferior don’t mean that one vein is better than the other, but that they’re located higher up and below the heart.)

  Once the claret is back in the heart, it needs to re-enter the pulmonary circulation and go back to the lungs to drop off the carbon dioxide and pick upwardly more oxygen.

How Does the Heart Beat?

The heart gets letters from the body that tell it when to pump more or less claret depending on a person’s needs. For example, when nosotros’re sleeping, it pumps just enough to provide for the lower amounts of oxygen needed past our bodies at residuum. But when nosotros’re exercising, the heart pumps faster so that our muscles become more oxygen and tin can piece of work harder.

How the heart beats is controlled by a system of electrical signals in the centre. The
sinus
(or sinoatrial)
node
is a modest area of tissue in the wall of the right atrium. It sends out an electrical signal to start the contracting (pumping) of the heart muscle. This node is called the pacemaker of the heart because information technology sets the charge per unit of the heartbeat and causes the rest of the middle to contract in its rhythm.

These electrical impulses make the atria contract first. So the impulses travel downwards to the
atrioventricular
(or AV)
node, which acts as a kind of relay station. From here, the electrical signal travels through the correct and left ventricles, making them contract.

One consummate heartbeat is made upwardly of ii phases:

1. The showtime stage is called
   systole (SISS-tuh-lee). This is when the ventricles contract and pump claret into the aorta and pulmonary artery. During systole, the atrioventricular valves shut, creating the first sound (the lub) of a heartbeat. When the atrioventricular valves shut, information technology keeps the blood from going dorsum upward into the atria. During this time, the aortic and pulmonary valves are open up to allow blood into the aorta and pulmonary artery. When the ventricles finish contracting, the aortic and pulmonary valves close to prevent blood from flowing back into the ventricles. These valves closing is what creates the second sound (the dub) of a heartbeat.
2. The 2nd stage is called
   diastole (die-Equally-tuh-lee). This is when the atrioventricular valves open and the ventricles relax. This allows the ventricles to make full with blood from the atria, and become ready for the next heartbeat.

How Can I Help Keep My Child’s Heart Healthy?

To help keep your child’due south heart healthy:

• Encourage enough of do.
• Offer a nutritious diet.
• Help your child reach and continue a healthy weight.
• Go for regular medical checkups.
• Tell the doctor near any family history of heart problems.

Let the md know if your child has any chest hurting, trouble breathing, or giddy or fainting spells; or if your child feels similar the heart sometimes goes really fast or skips a trounce.