What body systems other than the immune system, help to produce inflammation and fever?

The immune system similar to a tiny police force that always patrols every organ and tissue inside the body. It works closely with the circulatory system for shipment needs and the lymphatic system for the production of lymphocytes.

Explanation:

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these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.