Give reasons for the following statements.
- Ventricles have thicker walls than auricles.
- Valves are present at the opening of auricles into ventricles.
- The walls of arteries are thick.
Answer:
- This is because ventricles pump blood to lungs and to different body parts for which they need strength.
- Valves are present at the opening of auricles into ventricles to prevent backflow of blood.
- The walls of arteries are thick because they carry blood at high pressure.