Give reasons for the following statements

cbse
cbse-class-7-science
trans-plants-animals

#1

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.