The Respiratory System Quiz

Questions and Answers

To digest food

To circulate blood throughout the body

To regulate body temperature

To move oxygen into the body and carbon dioxide out (correct)

To aid in the digestion of food

To warm the air entering the body

To trap bacteria and other unwanted substances (correct)

To produce sound when speaking

Nose

Mouth

Throat (correct)

Larynx

Because they carry warm blood Signup and view all the answers

To channel air into the body Signup and view all the answers

To cover the path to the lungs when swallowing Signup and view all the answers

The vocal cords vibrate, creating sound Signup and view all the answers

To carry air to the lungs Signup and view all the answers

Coughing Signup and view all the answers

Lower chest Signup and view all the answers

Study Notes

The respiratory system is responsible for breathing, moving oxygen into the body and carbon dioxide out of the body.
The system is divided into two parts: the upper and lower respiratory tracts.

The upper respiratory tract includes the nose, throat, larynx, and trachea.
The nose channels air into the body, regardless of its shape or size.
The mouth can also channel air, but has other responsibilities like eating and smiling.
The nose and mouth are the only visible parts of the respiratory system.

Air enters the body through nostrils, the openings at the bottom of the nose.
The mucus-covered inner walls of the nose have tiny blood vessels and hairs that:
- Warm the air entering the body through warm blood flow.
- Trap bacteria and other unwanted particles through sticky mucus lining and hairs.
These blood vessels can bleed when you have a nosebleed.

The throat receives air from the nose and mouth and directs it to the lungs.
The epiglottis, a flap of tissue, covers the path to the lungs when you swallow, ensuring food goes to the stomach and air goes to the lungs.

The larynx is located inside the throat and enables sound production through vocal cords.
The epiglottis acts as a lid that covers the larynx when you swallow.

The trachea is a firm tube in the upper chest that carries air from the larynx to the lungs.
Coughing is a reflex that forces air out of the lungs to push objects out of the trachea, keeping the airway open.