Electrolysis Practice Exam

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What is the primary transport method for oxygen throughout the body?

Oxygen therapy
Blood
Interstitial fluid
Lymphatic system

The correct answer is: Blood

The primary transport method for oxygen throughout the body is indeed blood. Blood plays a crucial role in the circulatory system by carrying oxygen from the lungs to all tissues and organs. When a person inhales, oxygen enters the alveoli in the lungs, where it diffuses into the bloodstream. Hemoglobin, a protein found in red blood cells, binds to this oxygen, allowing it to be efficiently transported throughout the body. While other options like oxygen therapy may involve supplemental oxygen for patients with breathing difficulties, it does not represent the general method for oxygen transport in a healthy individual. Interstitial fluid, which surrounds cells, does not directly transport oxygen in significant amounts; rather, oxygen diffuses from the blood into the interstitial fluid to reach cells. The lymphatic system primarily transports lymph and is involved in immune functions rather than the transport of oxygen. Thus, blood remains the primary vehicle for oxygen distribution, critical for cellular respiration and overall metabolic processes in the body.