Question

1. which organ system is primarily responsible for transporting nutrients, gases, and wastes in the body?

respiratory system
digestive system
circulatory system
nervous system

Explanation:

• The respiratory system is mainly for gas exchange (e.g., oxygen intake, carbon dioxide release), not transporting nutrients and wastes throughout the body.
• The digestive system breaks down food and absorbs nutrients but doesn't transport them to all body cells or remove wastes from all cells.
• The circulatory system (including the heart, blood vessels, and blood) transports nutrients (from digestion), gases (like oxygen and carbon dioxide), and wastes (to be excreted) to and from cells throughout the body.
• The nervous system coordinates and controls body functions through electrical and chemical signals, not transportation of nutrients, gases, or wastes.

Answer:

C. Circulatory system