How Circulatory And Res. Work Together

Question 0

What is blood pressure?

Answer 0

Pressure of blood on artery walls- 120/80.
Pumping/resting.
Affected by nearness to heart and size/elasticity of artery.

Question 1

Blood movement

Answer 1

1. Ventricles push blood through arteries. (Away)
2. Skeletal muscle pushes blood through veins. Exercise is therefore important.
3. Valves also in veins keep blood moving forward.

Question 2

What is blood?

Answer 2

Nutrients: 55% plasma + 90% water + 10% dissolved nutrients.
Cells: 45% red blood cells + 1% white blood cells + platelets. (Blood clotters)