Biology Terms +
(a glossary of biological terms about living creatures including plants and all kinds of animal species and organisms)
Two or more organs interacting chemically, physically, or both, in ways that contribute to the survival of the whole organism: The organ system consists of different organs that function together as a biological system to carry out at least one task.
A membrane-bound sac or compartment for a separate, specialized task inside a cell, except for bacteria: A organelle is a functional unit, as a mitochondrion, within a cell.
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.
A group of individuals of the same kind, or the same species, occupying a given area: The population of the village amounts to only 250 people!
Any of various units of a substance that is smaller than an atom: An electron, proton, and a neutron are subatomic particles and are the three major particles of which atoms are composed.
An organized group of cells and surrounding substances functioning together in a specialized activity: Tissues form one of the functional and constructive parts or materials of an animal or plant.
Also check out the Index for other Scientific and Technological Topics.
