Circulation + Respiration

Question 1

Aorta

Answer 1

*main artery leaving heart

Question 2

Heart to rest of body

Answer 2

*blood leaves heart in aorta, branches out into smaller arteries, network throughout

Question 3

Lungs to heart

Answer 3

• O2 blood, lungs to left side of heart

* left side contracts, pump blood out of heart and into aorta

Question 4

Arteries

Answer 4

• away from heart
• oxygenated (pulmonary artery)
• strong, muscular walls, away=high pressure

Question 5

Veins

Answer 5

• towards heart
• deoxygenated (pulmonary vein)
• to heart, low pressure

Question 6

Capillaries

Answer 6

• networks, cells, nutrients and oxygen

* much smaller

Question 7

Respiration within cells

Answer 7

• mitochondria combine food molecules with O2
• energy released, used by cell
• CO2-by product
• CO2 diffused from cells back into blood in capillaries=deoxygenated

Question 8

Body back to heart and lungs

Answer 8

• deoxygenated blood in body, right side of heart through veins
• pumps blood to lungs through pulmonary arteries