Answer and Explanation: The excretory system helps the respiratory system by getting rid of carbon dioxide. The respiratory system helps the excretory system by getting rid of CO2 from the body. They both need each other and if one or the other did not exist, we might've not been able to survive. Tis demonstrates how vital they are for the human body.
The skin is made up of three layers, each with its own important parts. The layer on the outside is called the epidermis
C. Cells
Cells make up organs, which make up organisms, which make up populations
Answer:
1. b liver
2. a stapes
3. a pineal gland
4. b skin epidermis
5. tendons
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