Dendrites and axons.
Dendrites and axons are extensions/fibers in nerve cells that either recive or send information to neurons respectively.
→ The image below shows you both and more parts of a nerve cell.
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BioTeacher101
The basic building blocks that make up matter are called atoms.
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The RNA determine the instructions for a specific trait in an organism, since the DNA cannot leave the nucleus of the cell the RNA then makes a copy of the dna