Double closed circulatory systems

Question 1

What type of organisms are double closed circulatory systems found in?

Answer 1

Mammals and birds

Question 2

What are the 2 circulations of blood in a double closed circulatory system?

Answer 2

1. Blood pumped from heart -> lungs to pick up oxygen + unloads CO2 before returning to heart
2. Blood flows through heart + pumped around whole body before returning to heart again

Question 3

How does blood travel in double closed circulatory systems?

Answer 3

Blood travels through heart twice for each circuit of the body

Question 4

Why can organisms with double closed circulatory systems remain active? (blood flow)

Answer 4

Blood passes through on capillary network in each circuit - blood can be maintained at high pressure and fast blood flow