The Respiratory System

RAKHSHANDA HASHMIBS Ed.DEPARTMENT OF

EDUCATION,NUML,Isb

Primary Function of Respiratory System

• The respiratory system supplies the blood with oxygen so that the blood can deliver oxygen to all parts of the body.

• And also removes carbon dioxide waste that cells produce.

• . If you didn’t breathe you would pass out or die.

Respiratory System Structure• Nasal Cavity: Passes air through nose• Mouth: Passes air through• Pharynx: The throat. Cone shaped passageway

leading to trachea. • Trachea: Windpipe. Main tube connecting

nose/mouth to lungs.• Epiglottis: Flap that covers the entrance to the

trachea.• Lungs: Main organ of the respiratory

system.

Respiratory System Structure• Bronchi: Two tubes inside of lungs that air

passes through to the bronchioles.• Bronchioles: Small branching out tubes divided

into alveoli. • Alveoli: Tiny air sacs that do the oxidation and

the exhale of carbon dioxide.• Capillaries: Blood vessels that are imbedded in

the walls of the alveoli. While in the capillaries the blood discharges carbon dioxide into the alveoli and takes up oxygen from the air in the alveoli.

• Cilia: Hair like structures that remove dust and dirt from the air.

How the Respiratory System Works

Air that flows from the mouth or nasal cavity travels through the pharynx and

moves down to the trachea. Then the air moves to the bronchi tubes as they enter the lungs. Once the air gets in the lungs, the air enters separate branches called the bronchiole. Carbon dioxide passes from the blood into the alveoli and is

then exhaled.

How the Respiratory System Works

Once in your lungs Oxygen travels from your lungs through the

bloodstream to the cells in all parts of your body. Cells use the oxygen as fuel

and give off carbon dioxide as waste gas.The waste gas is carried by the bloodstream back to the lungs to be

exhaled.

INTERESTING

FACTS!!!!

Why Do I Yawn?

     When you are sleepy or drowsy the lungs do not take enough oxygen from the air. This causes a shortage of oxygen in our bodies. The brain senses this shortage of oxygen and sends a message that causes you to take a deep long breath---a YAWN.

Why Do I Sneeze?Sneezing is like a cough in the upper breathing passages. It is the body's way of removing an irritant from the sensitive mucous membranes of the nose. Many things can irritate the mucous membranes. Dust, pollen, pepper or even a cold blast of air are just some of the many things that may cause you to sneeze.

What Causes Hiccups?Hiccups are the sudden movements of the diaphragm. It is involuntary --- you have no control over hiccups, as you well know. There are many causes of hiccups. The diaphragm may get irritated, you may have eaten to fast, or maybe some substance in the blood could even have brought on the hiccups.

• About half a liter of water per day is lost through breathing.

• Yawning brings more oxygen to the lungs.

• Your right lung is larger than your left.• Your right lung has three lobes and your

left lung only has two• We breathe 13 pints of air every

minute.

Cont…People under 30 take in double the amount f oxygen in comparison to someone who's 80 years oldA person sleeping almost always breathes twelve or fifteen times a minute.

•The fastest recorded “ sneeze speed” is 165 km per

hour?

• It is healthier to breathe through your nose than your

mouth, because your nose hairs and mucus clean the

air.

How to keep your respiratory system healthy• Try to Avoid:

-Smoking-Being around a smoker(SecondHand)-Inhaling other chemicals and drugs.-Being around dusty or thick polluted air.

• What to do:- Exercise- Eat healthy- Go to annual doctor checkups