Respiration

1. What is respiration?
Respiration is the process by which the oxygen we breathed in is used to
break down food to release energy in cells.

2. What is the use of respiration?
During respiration, food is broken down in the presence of oxygen to release
energy. The energy released is used to support our body activities. Carbon
dioxide and water are also produced.

3+4. Can human live without respiring? Why?
Why is respiration so important to human-being?
Human cannot live without respiration because human need oxygen to keep
alive and the oxygen you breathed is to use for burning food, so the energy is
released and human can do anything, such as reading, sleeping, walking and
breathing. Therefore, respiration is important to human-being.