List the levels of the body, starting with the nerve cell.
| July 21, 2021 | education
First level. Nerve cell is a structural and functional unit of the nervous system.
Second level. Nervous tissue is a collection of neurons and connective tissue elements (neuroglia).
Third level. Organ – from the nervous tissue, the central and peripheral nervous systems are formed. Central is the brain and spinal cord; peripheral-spinal nerve fibers.
The fourth level is the organismic, integral unity of the nervous system with other organ systems.
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