do you mean dorsal or ventral horn?
ventral (closest to belly) contain fibres going out to the body, so ones terminating in tissues
dorsal (closest to back) contains fibres travelling from the body towards the CNS, carrying sensory information
grey matter is made of neurons (their cell bodies) white matter consists of axons (their processes)
white matter is white due to the fatty protein rich myelin which coats the processes but not the cell body
Axonal tracts of motor neurons (somatic motor nuclei)
sensory nuclei
Sensory nuclei
gray matter
Afferent impulses enter the spinal cord from the posterior section. They may get processed by interneurons. And, in most cases they exit the spinal cord through the efferent neurons in the anterior section. The reason that they refer to this as being opposite sides has to do with what are called the 'horns' inside the spinal cord. The afferent impulses enter the dorsal horns in the back and the efferent impulses exit in the front, the anterior horns. This may be why your reference, your teacher, or a book, says that impulses enter and leave from opposite sides of the spinal cord.
The spinal cord is posterior to the chest.
Anterior, meaning "front" would describe the front side of the spinal cord.
posterior part
The axon is locaed i the anterior horn on the spinal cord The axon is locaed in the anterior horn on the spinal cord
anterior
anterior
horns
It is a cell (neuron) located in the anterior horn of the spinal cord.
No, the trachea and the spinal cord run parallel from about the base of the skull to the lungs. The spinal cord is superior to (above) the trachea, that means the spinal cord lies dorsally to the trachea. You could also say that the trachea is inferior to the spinal cord.When you are doing body directions on a human, you have to lay the human on his belly. Anterior is towards the head; Posterior, towards the tail end. If you are a surgeon, then left and right are your left and right while facing the patient.
motor fibers
the white matter