CELLS OF THE NERVOUS TISSUE
Neurons
From the point of view of their structure and the organization of their extensions, the neurons can be classified as:
Unipolar neurons have a cell body and one axon – axons are shown in blue in the drawings. They are not very frequent and constitute, for example, sensory cells of the retina and olfactory mucosa.
Bipolar neurons – have a cell body, one dendrite (dendrites in red in the drawings), and one axon. They are found mainly in sensory structures such as retina, olfactory mucosa.
Pseudounipolar neurons – have a cell body one extension which has two parts. One behaves as a dendrite in and as an axon in the other portion. A typical example of this type is found in the neurons of the sensory ganglia of the spinal cord, responsible for conducting nerve impulses of touch, pressure, pain, heat, and cold towards the central nervous system.
Multipolar neurons have a cell body, several dendrites, and one axon. They are the majority of neurons in the nervous tissue and are the predominant type in the central nervous system.
From the point of view of their structure and the organization of their extensions, the neurons can be classified as:
Unipolar neurons have a cell body and one axon – axons are shown in blue in the drawings. They are not very frequent and constitute, for example, sensory cells of the retina and olfactory mucosa.
Bipolar neurons – have a cell body, one dendrite (dendrites in red in the drawings), and one axon. They are found mainly in sensory structures such as retina, olfactory mucosa.
Pseudounipolar neurons – have a cell body one extension which has two parts. One behaves as a dendrite in and as an axon in the other portion. A typical example of this type is found in the neurons of the sensory ganglia of the spinal cord, responsible for conducting nerve impulses of touch, pressure, pain, heat, and cold towards the central nervous system.
Multipolar neurons have a cell body, several dendrites, and one axon. They are the majority of neurons in the nervous tissue and are the predominant type in the central nervous system.
