8 Hospitals are often the worst places to get an infection, because the bacteria there are so
resistant to so many drugs. How did the bacteria get that way?
Include the following terms in your answer artificial selection, mutation, antibiotics, antibiotic
resistance, die, and grow. *
(3 Points)

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]

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.