Circulatory System P5

Question 1

Function

Answer 1

• Main transportation system for our body:
  1. Digested Food, Oxygen and Water to parts of body where they’re needed
  2. Carbon Dioxide and Waste Materials away from organs for removal

Question 2

Heart

Answer 2

1. Muscular organ with four chambers that lies between our two lungs and protected by our rib cage
2. Heart muscle contracts and relaxes continuously to pump blood around the body

Question 3

Blood Vessels

Answer 3

• Tubes that transport blood
• Arteries are the thickest blood vessels and transported blood rich in oxygen, away from the heart
• Veins transport blood rich in carbon dioxide, towards the heart
• Capillaries are the thinnest blood vessels and surround organs to facilitate substance exchange

Question 4

Flow of Blood

Answer 4

1. Oxygenated Blood: Lungs —> Heart —> Other Parts of the Body
2. Deoxygenated Blood: Other Parts of the Body —> Heart —> Lungs

Question 5

Heart Rate

Answer 5

1. Average healthy adult has a heart rate of about 60-100 beats per minute (bpm)
2. When we exercise, our heart pumps faster because our body needs more digested food and oxygen (different from lungs)