The structure of the heart (UEB contracted)
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- Synopsis
- This page shows a cross section diagram of the human heart showing blood flow. There is a locator dot shown, which will be at the top left, when the image is the correct way up. The heart is shown from the front. The heart is in two halves and each half has two chambers, ventricles in the bottom and smaller atriums in the top. There are five major blood vessels in the top half of the image. Oxygenated blood comes from the lungs in the pulmonary vein in the top right of the image. This flows into the left atrium which then pumps the blood into the left ventricle. This chamber has thick muscular walls to pump blood all over the body. The heart valves between the left atrium and ventricle close and the ventricle contracts. The blood flows into the aorta at the top right of the image. After the ventricle has contracted, the heart valves between the ventricle and the aorta close to stop blood flowing backwards. The blood returns to the heart from the main body via the inferior vena cava on the left of the image, and from the head and shoulders via the superior vena cava in the top left of the image. It flows into the right atrium which then pumps the blood into the right ventricle. This chamber is not as big as the left ventricle as it only has to pump blood the short distance to the lungs. The heart valves between the right atrium and ventricle close and the ventricle contracts. The blood flows into the pulmonary artery at the top left of the image. After the ventricle has contracted, the heart valves between the ventricle and the pulmonary artery close to stop blood flowing backwards. The blood goes to the lungs, is oxygenated, and returns to the heart via the pulmonary vein in the top right of the image to start the cycle again. To fit on the page the heart has been rotated clockwise slightly. In reality the vena cava takes a vertical, not diagonal path.
- Copyright:
- 2011
Book Details
- Book Quality:
- Excellent
- Publisher:
- RNIB
- Date of Addition:
- 05/25/17
- Copyrighted By:
- RNIB
- Adult content:
- No
- Language:
- English
- Has Image Descriptions:
- No
- Categories:
- Medicine
- Submitted By:
- Caroline Walker
- Proofread By:
- N/A
- Usage Restrictions:
- This is a copyrighted book.