The following steps are involved in muscle contraction: (1) The sequence of events leading to contraction is initiated somewhere in the central nervous system, either as voluntary activity from the brain or as reflex activity from the spinal cord.
The average Mexican man weighs 165 pounds and stands 5 feet 4 1/2 inches tall, while the median figures for Mexican women are 151 pounds and 5 feet 2 inches, according to a study released by a group representing Mexico's clothing industry.
That's a little over an inch shorter than the average height of adult men today. Even earlier reports of the average height of men in the United States include that: Pilgrim men probably averaged about 66 inches (1620) Native Americans averaged 68 inches (1800s)