Heart

• The heart has four chambers - two atria and two ventricles.
• Double circulatory system

  Humans have a double circulatory system. Pulmonary circuit which pumps blood from the heart to the lungs and from the lungs back to the heart. Systematic system pumps blood from the heart through out the whole body then comes back to the heart as deoxygenated blood.
• aorta

  carries oxygenated blood to all parts of the body
• superior vena cava

  carries deoxygenated blood from upper body to the heart
• right atrium

  receives deoxygenated blood from superior vena cava and inferior vena cava
• coronary artery

  supplies oxygenated blood to the muscles of the heart
• inferior vena cava

  carries deoxygenated blood from the lower part of the body to the heart
• pulmonary arteries

  carries deoxygenated blood to the lungs
• left atrium

  receives oxygenated blood from the lungs.
• coronary vein

  deoxygenated blood from the heart muscle
• pericardium

  membrane that encloses the heart
• Bicuspid valve

  Valve made up of the cusps, found between the right atrium and left ventricle
• Detoxify

  Remove poisonous substances usually in the blood
• Diastole

  Period of relaxation of the heart
• Pulmonary veins

  Carry blood away from the lungs
• Seni-lunar valve

  Half moon shaped valve found at the base of the aorta and pulmonary artery
• Sub-clavian vein


  Running underneath the clavicle, which is a key shaped bone
• Systole

  Period of contraction of the heart
• Tricuspid valve

  Valve made of three points found between the right ventricle and right atrium