Tour to the Respiratory System

Tour to the respiratory system

Teacher: There are 2 ways of controlling the breathing rate. First way is the medulla oblongata senses the carbon dioxide levels and sends a message to the lungs and the diaphragm to increase breathing. Second way is the chemo receptors senses oxygen pressure and medulla oblongata triggers the response. There are two types of ventilations. First one is Hypo ventilation where you breathe slowly as there is more carbon dioxide in blood; next one is hyper ventilation where you breathe quickly as you have lees carbon dioxide in the blood. So, are we good with the respiratory system?

Student 1: Yeah. We understand it, but it will be really cool if we can go through an actual respiratory system.

Teacher: Great idea Sarah! We will see.

(Next day)

Teacher: Today we are actually going on a tour to respiratory system as Sarah said. And we are going by our magic school bus.

Students: YAY!!

Teacher: Get ready guys.

(All are getting ready to go!)
(The bus changes into a mini size bus and enters through the principal’s nose)

Teacher: Now we are entering through nostrils. Nostrils take in air.

Student 2: Miss, are these grass like things called ciliated cells?

Teacher: Yes, It is. Anyone can remember what ciliated cells do?

Student 3: They produce mucous and they sent germs away by avoiding them into the lungs.

Teacher: Yeah. Very nice. These red backgrounds are called turbinates. They warm the air we breathe in. Mucous is a liquid kind of body fluid which takes away germs. Anyone knows why turbinates are red.

Student 1: I think it is because they have capillaries around them.

Teacher: Very good. So here comes the pharynx and pharynx connects throat to mouth and nasal cavity. Anyone can guess what’s coming up?

Student 4: Glottis and it is the opening to the trachea.

Teacher: Exactly and here comes the flap which is called epiglottis. It prevents food from entering the trachea and this is the larynx...