Write the definition for the word Phylogeny IN YOUR OWN WORDS.

Pylogeny is the study of evolution and the differences between living organisms.

Explanation:

When we study about the evolution, anatomy and differentiation of different people or organisms, it is called phylogeny.

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Answered by Benjemin

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.