How the blood enter to the heart?

Answer 1

Let's follow the flow of blood starting at the Aorta, the aorta is the main blood vessle that carries O2 rich blood to the vital organs, organs, systems, extremities, muscles, and most importantly the brain. All the above mentioned use the oxygen and give off carbon dioxide as a by product. The CO2 , carried by the blood travels back to the heartand enters the Right Atrium, another beat of the heart, the b;ood now moves through the tricuspid valve to the right ventricle. Remember, this is oxygen poor blood so withamother beat the blood mooves through the pulmonary arteries, (left & Right), to the lungs. Inside the lungs the blood drops off CO2 and picks up O2 using a process called osmosis*. The blood at the moment has little pressure so it goes back into the heart through the Pulmonary Veins into the Left Atrium. A beat of the heart sends it into the Left Ventricle. Around this chamber is a large muscle called the Myo Cardium and this muscle gives the pressure needed to push this blood oround the entire body.

*Osmosis, the diffusion of water or another solvent through a selectively permeable membrane. This membrane is like a sieve, allowing solvent molecules, which are small, to pass through it, but preventing larger molecules dissolved in the solvent from passing through.

Blood is transferred throughout the body via the heart, this is called systemic circulation. The heart is made up of 4 chambers. The right atria, the right ventricle, and the left atria, and left ventricle. The right side of the heart gets the oxygen poor blood ( the blood that already cycled through the body). The oxygen poor bood enters the right atrim through the Superior vena cava and the Inferior vena cava. When the heart relaxes after a contraction then the blood leaves the right atrium, passes through the tricuspid valve (a flap that seperates the two chambers) and fills the right ventricle. When the ventricle is full the tricuspid valve closes. Now the blood is in the right ventricle, but it is so full the blood has to go somewhere so it pushes through the pulmonary valve and goes to the pulmonary artery then right to the lungs to be filled with oxygen. From the lungs the bood is now oxygen rich (filled with O2). The blodd leaves the lungs by the pulmonary veins and enters the left atrium, as the heart relaxes the tricuspid valve opens and the left ventricle fills with blood. When the left ventricle gets full the blood is pushed through the aorta valve and goes in to the aorta. From the aorta the blood enters into systemic circulation and spreads oxygen rich blood throughout the body. And when there is no more oxygen left in the blood it traveles back to the heart to start the cycle all over.

Answer 2

At about 3 weeks of intra-uterine life, blood is produced by the mesenchymal tissue- an embryonic connective tissue from which are formed the blood vessels of the body- This is how blood originally enters the blood stream, both blood cells and blood vessels are formed by the mesenchyme, this is called the mesoblastic phase of hematopoiesis-blood production- Later in fetal life, the liver takes over. And at birth, the bone marrow is the main hematopoietic organ

Answer 3

The heart pumps the blood through the body and all through the veins. So the answer is pretty much the heart pumps it through! You should have learned that in 4th grade if you live in BC, Canada!

Answer 4

It is pumped through by the heart.

Deoxygenated blood is carried by veins from the body to the right side of the heart. The right ventricle pumps the deoxygenated blood to the lungs via the pulmonary arteries. Oxygen diffuses into the blood in the lungs, and carbon dioxide diffuses out of the blood into the lungs. After oxygenation, blood is carried to the left side of the heart via the pulmonary veins. The left ventricle pumps the oxygenated blood through the aorta, the largest artery in the body, to the rest of the body. The aorta branches into smaller arteries, which branch into arterioles, which branch into capillaries. At the capillaries, oxgen, nutrients, and certain hormones are delivered to the body cells, and the body cells deliver carbon dioxide, wastes, and certain hormones to the blood. The capillaries then form into venules, then veins, which then deliver the deoxygenated blood to the right side of the heart via the vena cavae, the largest veins in the body. This cycle occurs every second of every day of your life.

Answer 5

Before the food you eat can enter your blood stream, it needs to be digested, or broken down.

As soon as you put a morsel of food into your mouth, the process of digestion begins - assuming you chew your food carefully and allow the enzymes in your saliva to do their work. Once you swallow the morsel and it reaches your stomach, digestion continues there. The acids and enzymes in your stomach juices break down the food into tiny components that can be absorbed into your blood stream through the walls of your small intestine. Any parts of the food that cannot be digested or are too large to be absorbed travel to your colon and eventually leave your body as waste.

Answer 6

the deoxygenated blood enters the heart through the vena cava veins(superior vena cava from upper part of the body and inferior from lower part of the body). they open into the right auricle. oxygenated blood from the lungs enters the heart into the left auricle via the pulmonary vein.

Answer 7

you breathe it in