UNIT TWO: Lungs and Digestive System Flashcards
1
Q
Where is the site of Gas exchange
A
Alveoli
2
Q
Oxygen Diffuses from..?
A
An area of High concentration inside the alveoli to an area of low concentration in the red blood cells.
CO2 is the opposite
3
Q
What does the Cilia do in the Lungs?
A
Cilia is special hairs that move the trapped dirt out of the lungs
4
Q
What does the Digestive system do?
A
Allow insoluble food molecules to be broken down into small soluble food molecules and be absorbed into the blood.
5
Q
Food is moved through the digestive system through..?
A
Peristalsis
6
Q
Muscles behind the food..?
Muscles in front of the food..?
A
Contract
Relax
7
Q
What is Peristalsis?
A
Contractions of the gut wall
These contractions push food through from the oesophagus to the stomach…
8
Q
How is dirt trapped in the lungs?
A
Mucus
