SCIENCE 9 REVIEW

It is a large, dome-shaped muscle that contracts rhythmically and continually.

Are the very small air sacs where the exchange of oxygen and carbon dioxide takes place.

Is a wide, hollow tube that allows air flow to and from the lungs during respiration, also known as windpipe.

Is a leaf-shaped flap in the throat that prevents food and water from entering the trachea and the lungs.

It is a biochemical process to release energy and occurs in cellular level.

Which organ system in the body takes charge of gas exchange?

Which bone protects our lungs and heart?

Inside the nose is the nasal cavity, an opening that is lined with a ___________.

Which muscular organ pumps blood throughout the body?

Which valve separates right atrium and right ventricle?