Biology, 25.11.2020 20:20 LeoValdez5782
1. how many chambers does the human heart have?
2. what close the valves in the heart and why should they do this?
3. what do we call a pulse?
4. describe blood capillaries
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When does the circulatory system work with the respiratory system? a. during blood cell formation b. during cellular respiration c. during intestinal digestion d. during a viral infection
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An uncomfortable feeling in the ears when descending in an airplane is caused by changes in air pressure on the: a. inner ear b. middle ear c. eardrum d. hammer/anvil
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Afive-year study was carried out on a population of algae in a lake. the study found that the algae population was steadily decreasing in size. over the five-year period this decrease most likely led to
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1. how many chambers does the human heart have?
2. what close the valves in the heart and why shoul...
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