Biology Terms +
(a glossary of biological terms about living creatures including plants and all kinds of animal species and organisms)
organ system
Two or more organs interacting chemically, physically, or both, in ways that contribute to the survival of the whole organism.
organelle
Inside all cells except bacteria, a membrane-bound sac or compartment for a separate, specialized task.
phospholipids
A glycerol backbone, two fatty acid tails, and a hydrophilic "head" with a phosphate group and another polar group.
Phospholipids are the main materials of cell membranes, which have two layers of lipids.
Heads of one layer are dessolved in the cell's fluid interior, and heads of the other layer are dissolved in the surroundings.
Sandwiched between the two are all of the fatty acid tails, which are hydrophobic.
population
A group of individuals of the same kind, or the same species, occupying a given area.
subatomic particle
An electron, proton, or neutron; one of the three major particles of which atoms are composed.
tissue
An organized group of cells and surrounding substances functioning together in a specialized activity.
Also check out the Index for other Scientific and Technological Topics.
