The primary function of the respiratory system is to facilitate the exchange of oxygen and carbon dioxide between the body and the environment.

The nose is the first part of the respiratory system that air passes through. It filters and warms the air before it enters the trachea.

The trachea is a tube that carries air to and from the lungs. It is also known as the windpipe.

The small air sacs in the lungs where gas exchange takes place are called alveoli.

Respiration is the process by which oxygen is taken up by the body and carbon dioxide is released.

Photorespiration is not a type of respiration. It is a process that occurs in plants to release carbon dioxide and produce energy.

Hemoglobin is a protein in red blood cells that carries oxygen from the lungs to the tissues.

Carbon dioxide is a waste product of cellular respiration. It is removed from the body through the respiratory system.

Heart failure is not a respiratory disorder. It is a condition in which the heart is unable to pump blood effectively.

Ventilation is the process by which the lungs expand and contract to move air in and out of the body.

The biceps brachii is a muscle in the upper arm. It is not involved in respiration.

Perfusion is the exchange of gases between the lungs and the blood.

The respiratory system does not produce energy from food. This is the function of the digestive system.

Cellular respiration is the process by which oxygen is used by the body's cells to produce energy.

Helium is not a respiratory gas. It is a noble gas that is not involved in respiration.