Explain how the circulatory and excretory systems work together in an iguana to maintain homeostasis.

These systems interact to maintain internal balance (homeostasis). The circulatory system (represented by blood flow) transports substances, including excess salt and waste products, throughout the body. The excretory system, comprising the salt gland and kidney, then filters these substances from the blood. The salt gland removes excess salt, while the kidney regulates water and other waste products, preventing dehydration or overhydration. This coordinated effort ensures stable internal conditions for the iguana.