Which system is responsible for transporting nutrients and oxygen to body tissues?

• A. Respiratory system
• B. Endocrine system
• C. Circulatory system
• D. Nervous system

Answer: (C)

The circulatory system, also known as the cardiovascular system, plays a crucial role in transporting nutrients and oxygen throughout the body. This system consists of the heart, blood vessels, and blood. The heart pumps oxygen-rich blood away from itself and through the arteries to the tissues and organs. Alongside oxygen, essential nutrients, which are absorbed primarily from the digestive system, are delivered to cells through the bloodstream.

In addition to its transportation functions, the circulatory system also helps remove waste products from the tissues, ensuring that the body can maintain homeostasis. This interplay between oxygen, nutrients, and waste products is vital for cellular function and overall health.

In contrast, the respiratory system is primarily responsible for the exchange of gases (oxygen and carbon dioxide) in the lungs. The endocrine system involves hormone secretion and regulation of bodily processes, but does not directly transport oxygen or nutrients. The nervous system transmits signals throughout the body and helps coordinate activities, but it does not have a direct role in transporting nutrients and oxygen. Thus, the circulatory system is specifically designed for these roles, making it the correct answer.