Lungs

Question 1

Why do we breathe in an out?

Answer 1

To replace the carbon dioxide produced by the cells of our body and replace it with fresh oxygen.

Question 2

How much percentage of nitrogen, water vapor, carbon dioxide and oxygen when we breathe in?

Answer 2

O 21%
CO 0.4%
N 78%
WV 1%

Question 3

How much percentage of nitrogen, water vapor, carbon dioxide and oxygen when we breathe out?

Answer 3

O 15%
CO 4%
WV 5%
N 76%

Question 4

what is the chemical equation for cellular respiration?

Answer 4

glucose + oxygen – > water + carbon dioxide

Question 5

why is oxygen important?

Answer 5

it helps us to breath and release the energy stored in food for our cells to use.

Question 6

what is cellular respiration?

Answer 6

a chemical reaction that releases energy from food for cells to use.

Question 7

what is the process of breathing in?

Answer 7

1. air enters your body through your nose or mouth
2. then it travels down the pharynx and then hits the flap of tissue called the epiglottis.
3. then air enters your trachea (windpipe).
4. the air splits into the large bronchi and then the bronchioles.
5. then is goes into the alveoli where the gas exchange takes place.

Question 8

what is the other name for alveoli?

Answer 8

air filled sacks

Question 9

what is the function of the epiglottis?

Answer 9

to stop food from going into the lungs

Question 10

what is a diaphragm?

Answer 10

it is a curved muscles that contracts and expands to let oxygen in and out. `

Question 11

what is the function of the diaphragm?

Answer 11

when you breathe in, it tightens and pushes the rib cage out so you let air in.

when you breathe out it relaxes to let air out.

Question 12

what is vital capacity?

Answer 12

is the amount of air you can breathe in or out.

Question 13

what is the function of the raspatory system?

Answer 13

takes oxygen to the cells and removes carbon dioxide so you can breathe in and out

Question 14

what in the of the respitoray system?

Answer 14

mouth, nose, phraynx, trachea, bronchi, bronchioles, alveoli

Question 15

what features of the alveoli helps the gas exchange?

Answer 15

surrounded by any blood vessels, large surface area and 1mm thickness

Question 16

what happens to the pressure in the diaphragm muscle when you breathe in?

Answer 16

in decreases when you breathe in and the diaphragm muscle moves down

Question 17

what happens to the pressure in the diaphragm muscle when you breathe out?

Answer 17

it decreases when you breathe in and the diaphragm muscle moves up