What do crustaceans use for respiration?
book lungs
gills
trach...
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What role do traits play in affecting an organisms ability to reproduce? finches
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Which blood cell spend most of their time in the lymphatic system?
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The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes
Answers: 2
Mathematics, 28.01.2020 01:31
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