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The structure of a neuron can be described as a cell body with nerve processes that transmit signals from one neuron to another. Nerve processes exist as either dendrites or axons. More »

Hemoglobin is a complex protein molecule made up of four subunits of polypeptides, or globins, which are chains of amino acids. These globin subunits bind to non-ptorein heme groups containing an iron ion, which can bind... More »

Capillaries are composed of endothelium, which is a form of simple squamous epithelial tissue. Capillary walls are thin and only 5-10 microns wide, so red blood cells can only flow through them in single file. More »

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The dendrites, or "tentacles," of a neuron pick up an electrical nerve impulse and conduct it toward the soma, or cell body. The nerve impulse travels through the soma and is then conducted down a threadlike fiber called... More »

Bundles of nerve processes within the central nervous system are called fasciculi, tracts or funiculi, depending upon their size. All of these are types of neural pathways, cords of white neural matter that connect diffe... More »

The function of the axon terminal is to transmit a neurotransmitter from one neuron to another. The neurotransmitter is released from the end of the axon of one neuron and binds to the dendrites of the target neuron. Neu... More »

The part of the neuron that normally receives stimuli is the dendrite. The dendrites, which are numerous short-branched extensions, come together at the cell body. The purpose of the dendrites is to receive and combine t... More »