Question Video: Identifying the Primary Method for Removing Carbon Dioxide from the Body Biology

What is the primary method for removing carbon dioxide from the human body? [A] Exhaling it from the lungs [B] Secreting it from the skin [C] Excreting it in urine [D] Excreting it in feces


Video Transcript

What is the primary method for removing carbon dioxide from the human body? (A) Exhaling it from the lungs, (B) secreting it from the skin, (C) excreting it in urine, (D) excreting it in feces.

This question is asking us about carbon dioxide, which is a waste product of cellular respiration. Before answering this question, let’s first describe what waste products are and some ways that they can be removed from the body.

Metabolism is the sum of all chemical reactions in the body. These reactions are important for almost every process ranging from the breakdown of food molecules for energy to the synthesis of biological macromolecules. These chemical reactions can produce products that aren’t always useful for the human body or are sometimes toxic. These are known as waste products.

Here are some examples of some waste products produced by the body. Excess ions can be filtered out into urine by the kidneys. Ammonia is produced as a waste product from the breakdown of amino acids in proteins. This toxic compound can be converted into a less toxic compound called urea by the liver. Carbon dioxide is produced by a process called cellular respiration. This is where glucose from the food we eat is converted into carbon dioxide and water. In this process, energy is extracted and is used to power the different activities of our body and its cells. This carbon dioxide diffuses into the blood and is exhaled by the lungs. All of these organs contribute to our excretory system and are responsible for maintaining the body’s homeostasis.

Going back to our question, the primary method for removal of carbon dioxide from the body is given by answer choice (A), exhaling it from the lungs.

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