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.
List of systems of the human body. The main systems of the human body are: Cardiovascular / Circulatory system: Circulates blood around the body via the heart, arteries and veins, delivering oxygen and nutrients to organs and cells and carrying their waste products away. Digestive system / Excretory system: Mechanical and chemical processes that provide nutrients via the mouth, esophagus, stomach and intestines.