Organisation- The Circulatory System


The Heart and blood vessels form the basis of the This system ensures that substances can be exchanged readily between cells and their surroundings.

The Circulatory system in humans consists of the following parts:

  • The heart, a muscular pumping organ that keeps the blood flowing around the body. The Heart is made of cardiac muscle tissue. This is a particular type of muscle tissue which is indefatigable, that means it never gets tired.
  • The Blood, a fluid transport tissue consisting of plasma and blood cells which we will be looking at in another video
  • The arteries which carry blood away from the heart, the veins which return blood to the heart and the capillaries which act as relays for substances in the body.

Humans have a double circulatory system. They have two distinct circuits joined together. These two circuits are known as the  and