jamesb1799
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We need to label this diagram as part of our homework. I’ve looked in my notes from class, the PowerPoint the teacher used and in the textbook and I still can’t find it. Please can someone help? https://m.imgur.com/a/uTxdOdl
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macpatgh-Sheldon
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Name:  Spinal nerve diag edited.jpg
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1. "dorsal" refers to the top of an animal when lying flat on its belly e.g. the dorsal fins of a fish are the ones on top; in us humans, "dorsal" refers to our backs when we are lying on our tummies [as we normally stand on two legs]. The "dorsal" root of a spinal nerve is its sensory branch; it unites with the ventral root (containing motor neurones) to form the "whole" spinal nerve [a nerve originating in the spinal cord].

2. "ventral" refers to the bottom part of an animal lying flat - in ourselves it is the surface that includes our chest and tummy.

3. Because cell bodies are rounded in shape [cf axon is linear] so where cell bodies are located, there is a lump called a ganglion - in the brain, such areas are called "grey matter" whereas the parts where there are axons appear white (due to sheath of myelin) so white matter.

Hope this helps!
M (specialist biology tutor)
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jamesb1799
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Thanks so much
(Original post by macpatgh-Sheldon)
Name:  Spinal nerve diag edited.jpg
Views: 22
Size:  23.9 KB

1. "dorsal" refers to the top of an animal when lying flat on its belly e.g. the dorsal fins of a fish are the ones on top; in us humans, "dorsal" refers to our backs when we are lying on our tummies [as we normally stand on two legs]. The "dorsal" root of a spinal nerve is its sensory branch; it unites with the ventral root (containing motor neurones) to form the "whole" spinal nerve [a nerve originating in the spinal cord].

2. "ventral" refers to the bottom part of an animal lying flat - in ourselves it is the surface that includes our chest and tummy.

3. Because cell bodies are rounded in shape [cf axon is linear] so where cell bodies are located, there is a lump called a ganglion - in the brain, such areas are called "grey matter" whereas the parts where there are axons appear white (due to sheath of myelin) so white matter.

Hope this helps!
M (specialist biology tutor)
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