What is the relationship between diet and the structure of the digestive tract? minnows are mainly carnivorous, eating insects and other small animals. however, herbivory has evolved independently in minnows several times. what changes in digestive structure and function are associated with the evolution of herbivory?

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.  

copper and glass have high electrical conductivity