With hard numbers or estimates from all but three of the 49 states that have laws allowing for issuance of carry permits, the U.S. Government Accountability Office reports that there were about 8 million active permits in the United States as of December 31, 2011.
Mar 18, 2016. There are 11 major organ systems in our body. This includes the circulatory, respiratory, digestive, excretory, nervous, and endocrine systems. As well as the immune, skeletal, reproductive, muscle and integumentary systems.
Organ Systems. The human body is made up of several organ systems that work together as one unit. Organ systems fit between the hierarchical levels of organs and the organism. Ten major organ systems of the body are listed below along with several organs that are associated with each system. It is important to keep in mind that these organ systems don't just exist as individual units. The final product of these cooperating systems is one unit called the body.