Heart

• Which blood vessels take blood away from the heart?

  Arteries
• Which blood vessels take blood towards the heart?

  Veins
• Capillaries have the smallest lumen, they have a wall only one cell thick to maximise diffusion.
• Arteries have the thickest walls made of elastic and muscle to maintain the high pressure that the blood is pumped at.
• Veins have the widest lumen and have valves, these valves prevent the blood flowing the wrong way and are opened by pressure.
• Which blood vessel takes blood from the heart to the lungs?

  pulmonary artery
• Which blood vessel takes blood from the lungs to the heart?

  pulmonary vein
• What are the four chambers of the heart?

  The four chambers of the heart are the left atrium, right atrium, left ventricle, and right ventricle.
• What valves are on the right side of the heart?

  Tricuspid valves
• what valves are on the left side on the heart?

  bicuspid valves
• Deoxygenated blood enters the heart from the vena cava, flows through the right side of the heart through the right atrium through the tricuspid valves into the right ventricle then through the semi lunar valves into the pulmonary artery and into the lungs. Oxygenated blood from the lungs flows through the pulmonary vein to the left atrium through the bicuspid valves into the left ventricle through the semi lunar valves into the aorta and then to the body.
• How is the heart adapted to continue pumping?

  the muscle tissue doesn't grow tired meaning it can keep beating and pumping the blood around the body.
• What are the different parts of the heart?

  A) Left ventricle

  B) Left atrium

  C) Right ventricle

  D) semi lunar valves

  E) right atrium

  F) aorta

  G) valves