Topic 3 Circulatory System: Blood Pressure

Question 1

• Hydrostatic pressure from the heart contracting causes blood to move through the arteries
• Blood pressure drops as it reached the capillaries, and reached near zero in the venules
• Valves in the veins prevent backflow

Answer 1

Note

Question 2

1. Pumping of the heart assisted by movements of adjacent skeletal muscles
2. Expansion of atria each time the heart beats
3. Falling pressure in the chest when a person breathes

Answer 2

Blood continues to move through the veins due to