Sagot :
Answers:
1. Breathing..
2.oxygen, nutrients and other substances essential to our body.
1. Breathing..
2.oxygen, nutrients and other substances essential to our body.
Q1. Gas exchange happens when we inhale and exhale. We take in the oxygen, and emit carbon dioxide.
Q2. The blood delivers nutrients, oxygen and other chemicals that are absorbed by the body.
Q2. The blood delivers nutrients, oxygen and other chemicals that are absorbed by the body.