1. Infected needles
2. Insect bite
3. Organ transplant
4. Blood transfusion
Answer:
d and a
Explanation:
the central nervous system is the central obviously and the peripheral nervous system takes the information the CNS wants to send and send thm to the correct organ.
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Answer:
i believe that the answer is D because the systemic circulation is based on the oxygenated blood
Explanation: