circulatory system

• the Heart pumps blood containing oxygen and nutrients around the body.
• The circulatory system, made up of arteries, veins and capillaries carries substances around the body distributing them efficiently
• Pulmonary - Anything to do with the lungs
• Atria - Upper chambers of the heart
• ventricles - Lower chambers of the heart
• Arteries - Blood vessels that carry blood away from the heart
• veins - Blood vessels that carry blood back towards the heart
• ¡Atrium and Ventricles are chambers of the heart, there are 4 of them.
• Valves are flaps of connective tissue that stop blood from flowing backwards
• The Aorta takes blood to the body from the Left Side of the heart, the Vena Cava returns it to the right hand side.
• Key features of a mass transport system -

  • A suitable transport medium
  • Network of tubes/vessels to carry the transport medium
  • A way of making sure they travel in the right direction
  • A means of ensuring fast supply (i.e. this could be a pump or simply maintenance of a concentration gradient)
• open circulatory system -

  • Heart pumps blood (or similar fluid) into a body cavity.
  • In insects the “blood” is called haemolymph.
  • The heart is elongated and stretches along the length of the body and haemolymph drains back into the heart to be re-circulated.
  • Haemolymph doesn’t travel to the lungs to get oxygen because there are no lungs!