Cross Section Of Mammalian Spinal Cord
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The spinal cord has a central core of gray matter that looks somewhat butterfly or h shaped in cross sections.
Cross section of mammalian spinal cord. This canal is filled with cerebrospinal. The gray matter is the core and ends up to be four projections that are known as horns. Looking at a cross section of the spinal cord you would see gray matter shaped like a butterfly surrounded by white matter.
In humans the spinal cord begins at the occipital. Transverse section of spinal cord at mid lumbar level weigert stain for myelin. The spinal cord is a long thin tubular structure made up of nervous tissue which extends from the medulla oblongata in the brainstem to the lumbar region of the vertebral column it encloses the central canal of the spinal cord which contains cerebrospinal fluid the brain and spinal cord together make up the central nervous system cns.
Like the brain the spinal cord is covered by three connective tissue envelopes called the meninges the space between the outer and middle envelopes is filled with cerebrospinal fluid a clear colourless fluid that cushions the spinal cord. Spinal cord cross section. Draw in a reflex that includes a sensory nerve an interneuron and a motor nerve.
A cross section of the spinal cord reveals white matter arranged around a butterfly shaped area of gray matter. At the back are two dorsal horns and away from the back are two ventral horns. On the above image find the structures labelled in bold below.
Study the prepared slide of a cross section through the mammalian spinal cord in the region of a dorsal root ganglion. Draw a cross section of the mammalian spinal cord including the dorsal and ventral roots and draw a muscle to one side on the spinal cord. Draw in a reflex that includes a sensory nerve an internueron and a motor nerve.
Therefore they appear as black dots. In the center of the cord locate a small clear space which is known as the central canal. The core consists mainly of two posterior dorsal horns which extend toward the posterolateral surfaces of the cord and two thicker anterior ventral horns which extend toward the.
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