The soma of a neuron (i.e., the main part of the neuron in which the dendrites branch off of) contains many organelles, including granules called Nissl granules, which are composed largely of rough endoplasmic reticulum and free polyribosomes. The cell nucleus is a key feature of the soma.Click to see full answer. Accordingly, what does the soma do?Soma. The soma, or cell body, is where the signals from the dendrites are joined and passed on. The soma and the nucleus do not play an active role in the transmission of the neural signal. Instead, these two structures serve to maintain the cell and keep the neuron functional.Also Know, what are the 5 main parts of a neuron? A neuron has 4 basic parts: the dendrites, the cell body (also called the “soma”), the axon and the axon terminal. Dendrites – Extensions from the neuron cell body that take information to the cell body. Cell body (soma) – the part of the cell that contains the nucleus. In this way, what is the cell body made of? The cell body is the spherical part of the neuron that contains the nucleus and connects to the dendrites, which bring information into the neuron, and the axon, which sends information to other neurons. The job of the cell body is to control all of the functions of the cell.What is another word for Soma?m?-?t? or somas. Definition of soma (Entry 2 of 2) 1 : the body of an organism. 2 : all of an organism except the germ cells. 3 : cell body.