1. How do your respiratory and excretory systems interact? A. Lungs release oxygen C. Lungs release carbon dioxide B. Kidneys clean your blood D. The large intestine absorbs water 2. How do your digestive and circulatory systems interact? A. Your skull protects your brain B. The large intestine absorbs water C. Blood carries carbon dioxide to the lungs D. Blood absorbs nutrients from the small intestine
I think that for 1 it’s either A or B as the kidneys and everything get air and the lungs release it. For 2 is probably D as the others don’t really make much sense.
