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Cavity in the digestive tract just past the mouth itself. May be muscularized for sucking or swallowing in various animals.
Industry:Biology
1. The study of disease and abnormalities. 2. The manifestation of a disease, injury, or abnormality, as in bone or eggshell for example.
Industry:Biology
The process by which an egg (the female gamete) is released from the ovary. In animals other than mammals, with the exception of monotremes, this results in the laying of an egg outside of the body. When female mammals ovulate, the egg, if fertilized, is retained within the uterus.
Industry:Biology
Collection of organs which have related roles in an organism's functioning. The nervous system, vascular system, and muscle system are all organ systems.
Industry:Biology
Collection of tissues which performs a particular function or set of functions in an animal or plant's body. The heart, brain, and skin are three organs found in most animals. The leaf, stem, and root are three organs found in most plants. Organs are composed of tissues, and may be organized into larger organ systems.
Industry:Biology
A specialized cell that can react to stimuli and transmit impulses. A neuron consists of a body which contains the nucleus; dendrites, which are short branches off the body that receive incoming impulses; and a long axon which carries impulses away from the body and to the next neuron.
Industry:Biology
Sticky secretion used variously for locomotion, lubication, or protection from foreign particles.
Industry:Biology
Bundle of contractile cells which allow animals to move. Muscles must act against a skeleton to effect movement.
Industry:Biology
Front opening of the digestive tract, into which food is taken for digestion. In flatworms, the mouth is the only opening into the digestive cavity, and is located on the "belly" of the worm.
Industry:Biology
