CCE Science and Humanity Practice Exam

The circulatory system is responsible for the transportation of nutrients and waste products throughout the body. This complex network includes the heart, blood vessels, and blood, facilitating the movement of essential substances to various cells and tissues. Nutrients absorbed from the digestive system enter the bloodstream, where they are distributed to provide energy and support bodily functions. At the same time, waste products generated from cellular metabolism are collected by the circulatory system and transported to organs such as the kidneys and liver for detoxification and excretion. This dual role of transporting both vital nutrients and waste makes the circulatory system crucial for maintaining homeostasis and overall health.

In contrast, the digestive system focuses on breaking down food into nutrients but does not transport them. The nervous system is primarily involved in signaling and coordination of body activities, while the respiratory system handles the exchange of gases, specifically oxygen and carbon dioxide, without direct involvement in nutrient transport.