Respiratory system

Why is oxygen important for humans? In other words why will humans dies without oxygen?

Why do our cells get rid of carbon dioxide?

What is the function of the respiratory system?

Name the 4 process that plays a part in the respiration.

Explain the process of 1. External respiration and 2. Gas exchange.

In what process is oxygen transferred to the cell for cellular respiration?

What makes up the upper respiratory system?

What makes up the lower respiratory system?

What is the function of the nose?

What are sinuses?