Describe the path of blood through a bird's circulatory system. Start with the right side of the heart. Also explain where the blood picks up oxygen and where it releases the oxygen to the bird's body.
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To understand the path of blood through a bird's circulatory system, let's start with the right side of the heart. A bird's heart consists of two main chambers: the right atrium and the right ventricle.
1. Deoxygenated blood from the body enters the right atrium of the bird's heart through large veins called the superior and inferior vena cava.
2. The right atrium contracts, pushing the blood into the right ventricle.
3. From the right ventricle, the blood is pumped into the pulmonary artery, which carries it to the lungs.
4. In the lungs, oxygen exchange takes place. The blood picks up oxygen (O2) from tiny air sacs called alveoli, which are located deep within the bird's lungs.
5. Oxygenated blood then returns to the left side of the heart via the pulmonary veins.
6. The left side of the heart consists of the left atrium and the left ventricle.
7. From the left atrium, the oxygenated blood is pumped into the left ventricle.
8. The left ventricle then contracts, pumping the oxygenated blood out of the heart through the aorta, which is the main artery of the body.
9. The oxygenated blood flows through the aorta, distributing oxygen and nutrients to the bird's body.
10. As the blood moves through the capillaries, oxygen is released to the body's tissues and organs.
11. Deoxygenated blood, having released its oxygen, will then drain into veins and make its way back to the right side of the heart to continue the cycle.
In summary, the blood in a bird's circulatory system picks up oxygen in the lungs and releases it to the body's tissues and organs as it flows through the capillaries.