Respiratory System

The air sacs that are covered with capillaries where gas exchange takes place

• bronchi
• lungs
• oxygen
• alveoli

Flap of tissue that covers the opening to the windpipe during swallowing

• Pharynx

• Trachea

• Epiglottis

• bronchioles

What is the site of gas exchange?

• alveoli

• nose

• lung

• bronchi

The two narrower tubes branching from the trachea that leads into the lungs

• nose

• bronchi

• lungs

• alveoli

A chamber behind the nose and mouth that leads to the trachea and is part of the digestive system and respiratory system.

• pharynx

• trachea

• epiglottis

• larynx

The large muscle that contracts and relaxes and moves air in and out of the lungs.

• epiglottis

• alveoli

• diaphragm

• trachea

An air tube that is held open by C-shaped rings of cartilage. Also known as the windpipe.

• pharynx

• trachea

• nose

• alveoli

Tiny hairlike structures that line your nose and most other airways of the respiratory system.

• larynx

• alveoli

• cilia

• diaphragm

The main organs of the respiratory system

• heart

• lungs

• esophagus

• trachea

What is the main function of the respiratory system?

• to provide oxygen and remove carbon dioxide from the body
• to bring oxygen to the body
• to break down food and absorb nutrients
• to remove oxygen from the body and deliver carbon dioxide