2. Explain how human body systems maintain relatively constant internal conditions. Explain the role the urinary system plays in maintaining homeostasis.

What is happening on the "macro" level?

What is happening on the "micro" level?

A person eats a meal high in sodium. Trace these large amounts of sodium through the urinary system, explaining what happens throughout.

Explain the role the respiratory system plays in maintaining homeostasis.
Trace the movement of oxygen in and Co, out of a human, beginning/ending at the mouth, and including all detail through interactions of capillaries and alveoli.

Trace the movement of oxygen in and Co, out of an earthworm, a fish, and a bird