Zoology

Zoology

Contributors in Zoology

Zoology

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. ...

Mucus

Biology; Zoology

Sticky secretion used variously for locomotion, lubication, or protection from foreign particles.

Muscle

Biology; Zoology

Bundle of contractile cells which allow animals to move. Muscles must act against a skeleton to effect movement.

Mouth

Biology; Zoology

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.

Monotreme

Biology; Zoology

A mammal that lays eggs rather than giving live birth. Though laying eggs is a primitive reptilian trait, monotremes share many morphological, physiological, and reproductive characteristics with ...

Mesoderm

Biology; Zoology

In animals with three tissue layers (i.e. all except sponges and cnidarians), the middle layer of tissue, between the ectoderm and the endoderm. In vertebrates, for instance, the mesoderm forms the ...

Marsupial

Biology; Zoology

A mammal that gives live birth to young that have gestated for only a short period of time. The young usually crawl into a pouch (the marsupium) or protected area and attach to their mother's teat to ...