maybe 1:00????
im just trying to help :C
Answer:
ummmm not any species. maybe experimenting with plants or something. but you shouldn't interfere with animal life.
Explanation: they could die or get seriously ill from it
Answer:
an opening into a vessel or cavity of the body.
Answer: When the oxygen-rich blood gets to the cells, the cells receive the oxygen and release the carbon dioxide. The blood with less oxygen and a lot of carbon dioxide returns to the heart. Then the heart returns this blood to the lungs where carbon dioxide is released and oxygen is received.
Explanation:
