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The Mammalian Heart | Biology for GCSE/IGCSE - Year 11 PDF Download
The Mammalian Heart
- The heart's orientation in diagrams can be misleading, where what appears as the left side is actually the right, and vice versa.
- Deoxygenated blood from the body is received by the right side of the heart, which then pumps it to the lungs for oxygenation.
- Oxygenated blood from the lungs is received by the left side of the heart, which then pumps it out to the body to supply tissues with oxygen.
- Veins carry blood towards the heart, while arteries carry blood away from the heart to various body parts.
- The two sides of the heart are separated by a muscular wall known as the septum, maintaining the segregation of oxygenated and deoxygenated blood.
- The heart is primarily composed of muscle tissue, which is nourished by the coronary arteries, ensuring its continuous function.
Structure of the heart
Structure of the Heart
- Overview of the Heart's Anatomy:
- The heart is a vital organ responsible for pumping blood throughout the body.
- It is composed of four chambers: two atria and two ventricles.
- Function of Arteries and Veins:
- Arteries carry oxygen-rich blood away from the heart to various parts of the body.
- Veins transport oxygen-depleted blood back to the heart.
- Cardiac Cycle Explanation:
- The cardiac cycle involves the contraction and relaxation of the heart muscle to pump blood.
- It includes systole (contraction) and diastole (relaxation) phases.
- Importance of Blood Circulation:
- Efficient blood circulation ensures delivery of oxygen and nutrients to tissues.
- It also aids in the removal of waste products from cells.
Question for The Mammalian HeartTry yourself: Which side of the heart receives deoxygenated blood from the body?View Solution
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FAQs on The Mammalian Heart - Biology for GCSE/IGCSE - Year 11
| 1. What is the main function of the mammalian heart? |  |
Ans. The main function of the mammalian heart is to pump blood throughout the body, delivering oxygen and nutrients to cells and removing waste products.
| 2. How is the mammalian heart structured? | |
Ans. The mammalian heart is composed of four chambers - two atria and two ventricles. The heart also has valves that ensure blood flows in the correct direction, as well as a network of blood vessels that supply the heart muscle itself.
| 3. What is the significance of the electrical conduction system in the mammalian heart? | |
Ans. The electrical conduction system in the mammalian heart regulates the heartbeat by coordinating the contraction and relaxation of the heart muscle. This system ensures that the heart beats in a coordinated and efficient manner.
| 4. How does the mammalian heart maintain its own blood supply? | |
Ans. The mammalian heart maintains its own blood supply through a network of coronary arteries that branch off from the aorta. These arteries deliver oxygenated blood to the heart muscle, ensuring that it has the energy it needs to pump blood effectively.
| 5. How does the structure of the mammalian heart contribute to its function? | |
Ans. The structure of the mammalian heart, with its four chambers, valves, and electrical conduction system, allows it to efficiently pump blood throughout the body. The coordinated contraction and relaxation of the heart muscle ensure that blood is circulated effectively, supporting the body's metabolic needs.
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Nov 22, 2024 Last updated |
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