Respiratory System

Question 1

What happens to O2 and CO2?

Answer 1

O2 and CO2 diffuse more freely with the respiratory system and blood system. O2 attaches to blood cells travelling back to the heart. Simultaneously, CO2 in aliveoli is exhaled by a person.
Gas exchange allows new air in and old air out.

Question 2

What is gas exchange?

Answer 2

Oxygen moves from lungs through blood. Hemoglobin carries CO2 from blood to lungs

Question 3

What happens with the bronchus and bronchioles?

Answer 3

There are two bronchus: left and right. Then the bronchus splits into smaller bronchioles. The bronchioles end in tiny sacs called aliveoli. When a person breathes, these sacs inflate and deflate with air.

Question 4

What are the alveoli/alvoli?

Answer 4

Small, grape-like sacs that are surrounded by capillaries for gas exchange. 02 enters blood from alvoli/alveoli by being diffused and attached to capillaries. They inflate/deflate as a person breathes in and out.

Question 5

What is the lung?

Answer 5

The lung is the major respiratory organ.
We have 2 lungs in our body. C02 diffuses from blood to avioli;
high concentration of C02 in blood.

Question 6

What are the Bronchi?

Answer 6

Small branching tubes that lead from the trachea to the lungs and Aveoli

Branching allows greater surface area for the absorption

Question 7

What is the trachea?

Answer 7

Strong stable tube that allows gases to be inhaled and exhaled

Large opening allows max airflow
As you breathe, the air goes through the trachea.

Question 8

How does the respiratory system work?

Answer 8

O2 is inhaled through the nose/mouth, down the trachea, and to the lungs. O2 is passed from lungs to blood, while CO2 passes from blood to lungs