Human gas Exchange

Question 1

Where does gas exchange take place

Answer 1

Lungs

Question 2

What is the trachea

Answer 2

the entrance to the human gas exchange system
when we breath, air flows through the trachea
ridges of cartilage surround the front to provide structure and protection.

there is no cartilage at the back to prevent constriction of the oesophagus

Question 3

what are the Bronchi

Answer 3

2 divisions of the trachea
air flows along each bronchs to the lungs
they are made up of smooth muscle and cartilage

Question 4

what are bronchioles

Answer 4

they are divisions of the bronchi wich branch througout the lungs into the alveoli

Question 5

what are the alveoli

Answer 5

these are sacks that fill with air when we breath

oxygen in the alveoli diffuses out into the blood stream and carbin dioxide diffuses into the alveoli

the alveoli provide a large surface area for efficient gas exchange

Question 6

what is responsible for ventilation

Answer 6

the rib cage, diaphragm, and the intercostal muscles

when we inhale, these structures move to allow the lungs to fill with air
when we exhale, these structres move to allow air to leave the lungs

Question 7

what are the capillaries

Answer 7

they surround each alveoli and they provide a large surface area for efficient gas exchange between the alveoli and te blood stream

Question 8

what are the alveolar epithelium

Answer 8

they are made up single layer epithelial cells which line the walls of the alveoli

they provide a very short diffusion pathway between the alveoli and capillaries to maxi ise rate of gas exchange

Question 9

how does concentration gradient contribute to gas exchange rates

Answer 9

capillaries supply the alveoli with CO2 and the oxygen in the alveoli is quickly carried away
thisn rapid transportatkon of gases allows for there to be a steep concentfration gradient of CO2 and O2

the steep concentration gradient allows for quick diffusion of gases in and out of he bloodstream