Science: Breathing and Respiration - ch.3.2 Flashcards
1
Q
Respiratory system
A
Takes air into your body and makes oxygen available to cells.
2
Q
Respiration word equation
A
Oxygen + glucose -> carbon dioxide + water + energy
3
Q
Nostril
A
warms, moistens, and filters air
4
Q
Pharynx
A
Common pathway for food and air.
5
Q
Epiglottis
A
Stops food from going down the trachea.
6
Q
Larynx
A
Holds vocal cords.
7
Q
Trachea (windpipe)
A
Main airway from throat to lungs.
8
Q
Bronchiole
A
Branching (from the bronchi) airway within the lung.
9
Q
Alveoli
A
A cluster of sacs at the end of the bronchioles where gas exchange takes place
10
Q
Gas Exchange
A
Gases are exchanged easily between air and blood.
11
Q
Breathing In (inhale)
A
- Ribs move up and out
- Diaphragm contracts and flattens
- Lungs expand
- Intercostal muscles contract
- Air pressure in the lungs decreases
12
Q
Breathing Out (exhale)
A
- Ribs move down and in
- Diaphragm relaxes
- Lungs shrink back to normal
- Intercostal muscles relax
- Air pressure in the lungs increases
