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What are the structures and functions of the circulatory system

User Martin Sax
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Answer:

  • The circulatory system transports blood around the body.
  • The heart is the muscular organ that pumps the blood.
  • Three types of blood vessels carry the blood.
  • Arteries take blood at high pressure away from the heart and so have thick walls, but small lumens.
  • Veins take blood at lower pressure towards the heart.
  • They have larger lumens, but thinner walls.
  • Veins have valves to stop blood flowing in the wrong direction.
  • Capillaries are the smallest.
  • They have walls that are only one cell thick.
  • These features allow capillaries to easily exchange materials such as oxygen with nearby cells

User Mluker
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Answer:

The circulatory (cardiovascular) system for humans include: heart, blood, arteries and blood vessels. The heart pumps the blood through the arteries and then throughout the body by then using blood vessels.

User Ftdysa
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