One small change in an ecosystem can lead to drastic results
Hope this helps!
-Payshence
Answer:
The Lungs. The lungs play a mandatory role in the excretory system. Your lungs remove the carbon dioxide built up in your blood using specialized cells known as alveoli. Your lungs process the molecules into gas and when you breathe, the gas is ejected from your body.
Explanation:
The embryo implants itself in the endometrium
It is either carcinogens or viruses (I think the first) I hope this helps!
