Summary

Respiration is the process by which oxygen is taken into the body to breakdown food substances. Carbon dioxide and water are the by-products of respiration.

Respiratory organs are structures used by organisms for respiration. Animals use different respiratory organs for respiration. Animals use different respiratory organs for respiration.

Air gets to the lungs through: Nostril →larynx →trachea →bronchus →bronchioles → Alveoli of lungs.