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The Circulatory System
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Circulatory System in anatomy and physiology. The course taken by the blood through the arteries, capillaries, and veins back to the heart. In humans and the higher vertebrates, the heart is made up of four chambers. The right and left auricles, or atria, and the right and left ventricles. The ....
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....urs almost simultaneously in both atria. The mass of blood in the veins makes it impossible for any blood to flow backward. The ventricular systole immediately follows the atrial systole. The heart is entirely at rest for a short time after the ventricular systole occurs with every beat. The heart emits two sounds, which are followed by a short pains, the first sound, concidering with the ventricular systole, is dull and protracted the second sound. Made by the sudden closure of the semilar.... |
| Number of words: 521 |
Approximate pages: 2 |
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