Circulatory System

• Your heart beats faster and your breathing rate increases when you do strenuous activities
• The body demands greater energy to perform physically demanding activities such as running and jogging
• Energy supply


  Requires food that contains nutrients, such as glucose
• Cellular respiration


  1. Requires oxygen

  2. Processes nutrients metabolically by your cells
• A constant supply of oxygen is obtained by your body through breathing
• The oxygen that you take in

  Is distributed throughout your body through the blood that your heart pumps
• Circulatory system


  Also known as the internal transport system
• Components of the circulatory system

  • Cardiovascular system
  • Lymphatic system
• Functions of the circulatory system

  • Transports nutrients and oxygen to various cells all over the body
  • Collects waste and transports them to respective organs for excretion
  • Helps maintain fluid balance and normal body temperature
  • Acts as defense against harmful bacteria that may cause diseases
• Waste products such as carbon dioxide are carried away from the cells and released out of the body through the lungs