aerobic and anaerobic exercise

Question 1

explain the passage of air into the lungs

Answer 1

Air enters the body and is warmed as it travels through the mouth and nose.
It then enters the trachea.
The trachea divides into two bronchi. One bronchus enters each lung.
Each bronchus branches out into smaller tubes called bronchioles. Air travels through these bronchioles.
At the end of the bronchioles, the air enters one of the many millions of alveoli where gaseous exchange takes place

Question 2

what are the 2 terms used for breathing

Answer 2

inhalation and exalhation or inspiration and expiration

Question 3

name 2 important structures for breathing

Answer 3

the diaphragm and the intercostals

Question 4

what happens during inhalation with the muscles that help breathing

Answer 4

the intercostals contract and move the ribs up and out while the diaphragm contracts and moves downwards..when exercising other muscles like pecs help

Question 5

what happens during exhalation with the muscles that help breathing

Answer 5

The diaphragm relaxes and moves back to its domed shape. The intercostal muscles relax so the ribs move inwards and downwards

Question 6

define diffusion

Answer 6

Diffusion is the movement of gas from an area of high concentration to an area of low concentration.

Question 7

define gaseous exhange

Answer 7

Gaseous exchange occurs at the alveoli in the lungs and takes place by diffusion. The alveoli are surrounded by capillaries so oxygen and carbon dioxide diffuse between the air in the alveoli and the blood in the capillaries.

There is a high concentration of oxygen in the alveoli and a low concentration of oxygen in the blood, so oxygen diffuses from the alveoli into the blood.

There is a high concentration of carbon dioxide in the blood and a low concentration in the alveoli, so carbon dioxide diffuses from the blood into the alveoli.