Question

6. Explain the differences.
a. Arteries and veins.
b. External and internal respiration.
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Answer 1

Answer:

a.Arteries are blood vessels responsible for carrying oxygen-rich blood away from the heart to the body. Veins are blood vessels that carry blood low in oxygen from the body back to the heart for reoxygenation. Arteries and veins are two of the body's main type of blood vessels.

b.External Respiration: External respiration refers to the gas exchange across the respiratory membrane of lungs. Internal Respiration: Oxygen diffuses out from the blood into tissue during internal respiration. External Respiration: Oxygen diffuses from alveolar air into the blood during external respiration