Which organ systems are primarily affected by carbon monoxide poisoning?

Which organ systems are primarily affected by carbon monoxide poisoning?

• A. Digestive and endocrine systems.
• B. Muscular and skeletal systems.
• C. Circulatory and nervous systems.
• D. Immune and lymphatic systems.

Answer: (C)

Carbon monoxide poisoning mainly disrupts how oxygen is delivered to and used by the body's tissues, so the circulatory and nervous systems are most affected. CO binds to hemoglobin with much higher affinity than oxygen, forming carboxyhemoglobin and drastically reducing the blood’s oxygen-carrying capacity. It also shifts the oxygen-hemoglobin dissociation curve in a way that makes it harder for oxygen to be released to tissues, leading to tissue hypoxia. The brain and heart—the systems with the highest oxygen demand—are especially vulnerable, which is why neurological symptoms (headache, dizziness, confusion) and cardiovascular effects are common. In addition, CO can directly interfere with cellular respiration by binding to mitochondrial enzymes, further compromising energy production in nerve and heart tissue. While other organ systems can be affected, the combination of impaired oxygen transport and impaired cellular respiration most prominently involves the circulatory and nervous systems.

Carbon monoxide poisoning mainly disrupts how oxygen is delivered to and used by the body's tissues, so the circulatory and nervous systems are most affected. CO binds to hemoglobin with much higher affinity than oxygen, forming carboxyhemoglobin and drastically reducing the blood’s oxygen-carrying capacity. It also shifts the oxygen-hemoglobin dissociation curve in a way that makes it harder for oxygen to be released to tissues, leading to tissue hypoxia. The brain and heart—the systems with the highest oxygen demand—are especially vulnerable, which is why neurological symptoms (headache, dizziness, confusion) and cardiovascular effects are common. In addition, CO can directly interfere with cellular respiration by binding to mitochondrial enzymes, further compromising energy production in nerve and heart tissue. While other organ systems can be affected, the combination of impaired oxygen transport and impaired cellular respiration most prominently involves the circulatory and nervous systems.