Please enable JavaScript.
Coggle requires JavaScript to display documents.
The Heart - Coggle Diagram
The Heart
Blood vessels
Arteries
-
-
The walls are thick in comparison to the lumen (hole) because the heart pumps blood out at a high pressure.
Capillaries
Thin wall - only 1 cell thick. This increases the rate of diffusion by decreasing the distance over which it occurs.
-
-
-
-
-
blood cycle
Blood flows into both atria from the pulmonary vein and vena cava. The vena cava pumps in deoxygenated blood whereas the pulmonary vein brings in oxygenated blood.
The atria contract, pushing blood into the ventricles.
The ventricles contract, forcing the blood into the pulmonary artery and the aorta - out of the heart. The aorta pumps out oxygenated blood, whereas the pulmonary artery pumps out deoxygenated blood.
-
-
The heart has valves to make sure that the blood flows in the right direction - they prevent it from flowing backwards.