Dendrite- the bushy, branching extensions of a neuron that receive messages and conduct impulses toward the cell body/ Axon- the extension of a neuron, ending in branching terminal fibers, through which messages pass to other neurons of to muscles or glands
Ruptured capillary. Coloured scanning electron micrograph (SEM) of a red blood cell squeezing out of a torn capillary. A capillary is the smallest type of blood vessel, often only just large enough for red blood cells to pass through. Red blood cells (erythrocytes) are biconcave, disc-shaped cells that transport oxygen from the lungs to body cells.
While scientists believe that sleep re-energizes the body's cells, clears waste from the brain, and supports learning and memory, much still needs to be learned about the part it plays in regulating mood, appetite and libido.