3. Look at the picture showing Earth's path around the Sun. a) What is this path called? b) How long does it take for Earth to complete a complete circuit around the Sun? c) Name one planet that is closer to the Sun than Earth and another one that is further away. .​

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.  

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