Alveoli must be thin for fast diffusion – 1 cell thick.
It must be moist for gases (oxygen and CO2) to pass through.
Oxygen dissolves into the moisture (water) and then moves into bloodstream as a liquid.
Moves as a gas = caught and causes a stroke. Tissues down stream die.
Millions of blood capillaries surround the alveoli.
Oxygen diffuses through alveoli into the blood stream.
Oxygen in the blood attaches onto RBC – 250,000 hemoglobin/ RBC.
Heme = iron; globin = proteins.
Each hemoglobin can carry 4 things.
Hemoglobin in the lungs dumps out CO2 and picks up O2.
INHALED AIREXHALED AIR 78 % nitrogen 78 % nitrogen 21% oxygen 16% oxygen 0.04 % CO2 5 % CO2 * CO2 is carried by methods: A.. Hemoglobin. B.. Carbonic acid in blood plasma: CO2 + H2O = H2CO3
ABNORMAL:
CO attaches to RBC permanently; blocks O2 to cells.
Sickle cell anemia: RBC healthy shaped like a hockey puck.
oAbnormal shape = banana; clumps a lot; carries lower O2.
- Occurs through alveoli membranes.
- Alveoli must be thin for fast diffusion – 1 cell thick.
- It must be moist for gases (oxygen and CO2) to pass through.
- Oxygen dissolves into the moisture (water) and then moves into bloodstream as a liquid.
- Moves as a gas = caught and causes a stroke. Tissues down stream die.
- Millions of blood capillaries surround the alveoli.
- Oxygen diffuses through alveoli into the blood stream.
- Oxygen in the blood attaches onto RBC – 250,000 hemoglobin/ RBC.
- Heme = iron; globin = proteins.
- Each hemoglobin can carry 4 things.
- Hemoglobin in the lungs dumps out CO2 and picks up O2.
INHALED AIR EXHALED AIR78 % nitrogen 78 % nitrogen
21% oxygen 16% oxygen
0.04 % CO2 5 % CO2
* CO2 is carried by methods:
A.. Hemoglobin.
B.. Carbonic acid in blood plasma: CO2 + H2O = H2CO3
ABNORMAL: