Respiratory System

Anatomy and Physiology

Nose

Is made of bones, cartilage, and skin. It contains small hairs called cilia to prevent large particles from entering

Pharynx

During respiration, air enters through the nose and mouth into the pharynx. The pharynx is also part of the digestive system

Larynx

Superior to the trachea, the larynx produces a person’s voice

Trachea

Also called the windpipe, the trachea extends from the larynx and branches into the bronchi. It is lined with cilia

Lungs

These two cone-shaped organs are located in the chest. The lungs contain bronchi, alveoli, and many blood vessels. The right lung is larger and divided into three lobes. The left lung has two lobes. Both lungs are surrounded by a membrane called pleura.