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 »

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 »

A neuron, also known as a nerve cell, detects stimuli in its environment, integrates the information and then decides whether or not to transmit a signal to the next cell. There are three varieties of neurons: sensory ne... More »

The basic functional unit of the nervous system is the nerve cell, also called a neuron. These cells are specialized to send information through the body in the form of electrical action potentials. These travel from one... More » Science Human Anatomy Nerves