Structure of Cardiovascular System

• If you clench your hand into a fist, it would approximately be the same size as your heart
• The heart is located in the middle of the chest and slightly towards the left
• The right hand side of the heart pumps deoxygenated blood to the lungs
• The left side of the heart pumps oxygenated blood to the rest of the body
• Fill in the labels of the heart diagram below

  A) Semilunar Valves

  B) Left Atrium

  C) Bicuspid Valve

  D) Left Ventricle

  E) Right Ventricle

  F) Septum

  G) Tricuspid Valve

  H) Right Atrium

  
• The atria (plural of atrium) are where the blood collects when it enters the heart
• The ventricles pump blood out of the heart to the lungs or around the body
• The septum separates the right-hand and left-hand sides of the heart
• The septum separates the right-hand and left-hand sides of the heart
• The tricuspid valve separates the right atrium and right ventricle - It opens due to a build-up of pressure in the right atrium, and prevents back flow of blood from the right ventricle to the right atrium
• The bicuspid valve separates the left atrium and left ventricle -It opens due to a build-up of pressure in the left atrium and prevents back flow of blood from the left ventricle to the left atrium
• The semilunar valves stop the back flow of blood into the heart - There is a semilunar valve where the aorta leaves the left ventricle and a semilunar valve where the pulmonary artery leaves the right ventricle