Brain central nervous system human being nerve tissue neurons organize the parts of this body system in the correct order according to the levels of organization in a multicellular organism, simplest to most complex.. a) human being - central nervous system - brain - nerve tissue - neurons b) brain - neurons - nerve tissue - central nervous system - human being c) neurons - nerve tissue - brain - central nervous system - human being d) nerve tissue - neurons - brain - central nervous system - human being

C) neurons - nerve tissue - brain - central nervous system - human being

Explanation:

This is due to the neurons being the smallest part so they have less inside, while the human body is composed of so many things inside making studying it complex.

the abdomen (less formally called the belly, stomach, tummy or midriff) constitutes the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. the region occupied by the abdomen is termed the abdominal cavity. the stomach secretes acid and enzymes that digest food. ridges of muscle tissue called rugae line the stomach. the stomach muscles contract periodically, churning food to enhance digestion. the pyloric sphincter is a muscular valve that opens to allow food to pass from the stomach to the small intestine.

meiosis is the correct answer