Vesicle

Science / Geology / Vesicle: Spherical or elongated cavities in an igneous rock that are created when a melt crystallizes with bubbles of gas trapped inside.

Synaptic Vesicles

Science / Biology / Synaptic Vesicles: Vesicles at the synapse end of an axon that contain the neurotransmitters. MORE

Seminal Vesicles

Science / Biology / Seminal Vesicles: Glands that contribute fructose to sperm. The fructose serves as an energy source. The structures that add fructose and hormones to semen. MORE

Vesicles

Science / Biology / Vesicles: Small membrane-bound spaces in most plant and animal cells that transport macromolecules into and out of the cell and carry materials between organelles in the cell. MORE

Scoria

Science / Geology / Scoria: Congealed lava, usually of mafic composition, with a large number of vesicles formed by gases coming out of solution. MORE

Pumice

Science / Geology / Pumice: A vesicular volcanic glass of granitic composition. It has so many vesicles that it has a very low specific gravity - sometimes low enough to float on water. Picture of Pumice. MORE

Exocytosis

Science / Biology / Exocytosis: The process in which a membrane-enclosed vesicle first fuses with the plasma membrane and then opens and releases its contents to the outside. MORE

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