The Respiratory SystemThe Respiratory System

Purpose of the respiratory system To provide a constant supply of oxygen to

keep your body cells functioning

To remove carbon dioxide from the body cells

Organs of the respiratory system Nose / mouth Nasal cavity Pharynx Epiglottis Larynx Trachea

• Trachea• Bronchus (bronchi)• Bronchioles• Alveoli • Pleura • Diaphragm

Lungs

http://www.bbc.co.uk

Mouth & Nose

Brings air into the body

Nasal hairs in nostrils trap dust

Nasal cavity

Warms & moistens air

Pharynx

Tube-like passageway used by food, liquid, and air

At the lower end of the pharynx is a flap of tissue called the epiglottis

covers the trachea during swallowing so that food does not enter the lungs

Larynx

“Voice box”

The airway to which two pairs of horizontal folds of tissue, called vocal cords, are attached

Trachea

Air-conducting tube

Connects the larynx with the bronchi

Bronchi

Two short tubes that branch off the lower end of the trachea

Carry air into the lungs.

Also called as bronchus

Bronchioles

Tiny branches of air tubes in the lungs

Connect bronchi to alveoli

Alveoli Tiny, thin-walled, grapelike clusters at the

end of each bronchiole

Surrounded by capillaries

Where carbon dioxide and oxygen exchange take place

Also called alveolus

Pleura

Membrane lining the lungs and chest cavity

Diaphragm

Muscle wall between the chest and the abdomen that the body uses for breathing

http://mhln.com