razones o porqués, debes utilizar conceptos, datos de las ondas ELM, modelo de cómo las ondas ELM transmiten información y su relación con los medios de comunicación e información, conclusiones y teorías estudiadas que consideres necesarias​

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

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.