Q49 of 367 Page 73

What change occurs in heart beats if a person runs for a while? Why?

When a person runs for a while, his heart beat becomes faster because he needs more energy to run.


More from this chapter

All 367 →
48

What is meant by 'systolic pressure' and 'diastolic pressure'? What are their normal values?

 49

What is meant by 'heart beat' ? What is the usual heart beat rate at rest?

 50

What is blood? Why is it red?

 50

State the functions of blood in our body.