Flashcards trim. 3 natural science
(54 cards)
Burning food
Definition: Burning your food transforms the energy from your food into energy your BODY can use.
Respiration
transporting O2 and CO2 between cells and the external environment.
Inhalation= inspiration
breathing in air to get oxygen to the cells.
Exhalation= expiration
breathing out air
The lungs are protected
by the pleurae
Pleural fluid:
Definition: Pleural fluid make sure the pleurae sticks together, so we can breath easily.
Air:
Definition: Air is the gaseous mixture surrounding the Earth.
Gaseous mixture=
atmosphere
What happens when we inhale?
1
When you inhale the air goes to the little alveoli.
2
The oxygen in the air goes from these little sacks into the bloodstream.
3
Red blood cells transport the oxygen all the way to the cells.
4
The cell uses this oxygen to produce energy. As a consequence, the cell produces carbon dioxide.
5
The blood carries the carbon dioxide back to the little alveoli.
6
The carbon dioxide enters the alveoli, and the air is then pushed out of the lungs together with the rest of the air when we expire.
What happens when we inhale?
1
The diaphragm and the intercostal muscles interact.
2
The pleurae attached to the muscles follows the movement.
3
The pleural fluid follows.
4
The pleurae around the lungs follows.
5
The lungs open.
6
There is more space for gaseous mixtures.
7
Air wants to fill up that space and enters the nose.
8
Air goes through the trachea.
