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Like all living things, we need oxygen to live. Our body gets oxygen when you breathe.


PARTS OF THE RESPIRATORY SYSTEM

NOSE TRACHEA LUNGS DIAPHRAGM


TRACHEA

The trachea is the main pipe, that goes from the nose and mouth to your lungs. It is found in the neck .

The the air en n t che the tr ers th st t o th achea rough t e lu l ngs eads i he nos t in . to t e, he

The trachea is divided into 2 main tubes, one leading to each lung.


The lungs are the place where the exchange of oxygen and carbon dioxide takes place. of s he t to c an nec are r t b con ere s lle es , th a m pip ide s s e ir Th ur a s. In . yo sac ries air pilla ca

Th ve e o in ry t xyg to in en yo y w p ur al as bl ls o ses oo d. f th thro ec u ap g h illa th rie e s

When you breathe in, air filled with oxygen collects in the air sacs. Carbon dioxide passes back through the capillary walls into the air sacs. When you breathe out, carbon dioxide travels and goes out.


DIAPHRAGM t a h t n e l c ce i s u pa air m s y e r e h a t k t n ma let u l o to to Inv rks est in. w o ur c h a t h e yo u bre yo It is a

Wh e it g n it c ets ont rac f l pul a t ts, ter ls t a he lun nd gs dow n.

smooth muscle stretched across the bottom of your lungs When you breathe out, the muscles relax and the lungs shrink.


LET’S REMEMBER! 1. Which are the main organs of the Respiratory System? The nose and mouth, the trachea, the lungs and the diaphragm. 2. How many lungs do we have ? We have two lungs. 3. How does the air enter to our body? The air enters to our body through the nose or the mouth, then it goes to trachea and reaches the lungs. 4. Where does the exchange of oxygen and carbon dioxide occur? In the trachea.

In the lungs.

In the diaphragm.

5. Why is the diaphragm important? Because it makes space in your chest to let the air you breathe in.


CAN YOU NAME THEM? TRACHEA DIAPHRAGM

NOSE

ALVEOLI

LUNGS



Respiratory System_mbelen