PLEASE Percentage of oxygen in inhaled air and exhaled air experiment.
Aim:

Hypothesis:

Variables:
a. Manipulated
b. Responding
c. Constant

Apparatus/Material:

Figure:

Procedures/Methods:

Observations:

Interprete Data:

Discussion:

Conclusion:
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c for sure

Explanation:

Answer is in the photo. I couldn't attach it here, but uploaded it to a file hosting. link below! Good Luck!

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dz nuts.   eeneneneeenenne

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.