Question: Where does diffusion occur in the excretory system?
Answer: diffusion
Disambiguated annotations:
qaPairs: question: Where does diffusion occur in the marine invertebrate excretory system?
answer: through the skin
question: Where does diffusion occur in the amphibian excretory system?
answer: skin
question: Where does diffusion of oxygen and carbon dioxide occur in the human excretory system?
answer: Lungs
question: Where does diffusion of salt, water, and waste occur in the excretory system?
answer: Kidneys
question: Where does diffusion of calcium occur in the excretory system?
answer: Intestines