Answer:respiratory system
Explanation:The primary function of the respiratory system is to deliver oxygen to the cells of the body's tissues and remove carbon dioxide, a cell waste product. The main structures of the human respiratory system are the nasal cavity, the trachea, and lungs
Answer:
where is your other answer choices?
Explanation:
Gene expression is the process by which information from a gene is used in the synthesis of a functional gene product. These products are often proteins.
