General

General

General nature or nature terms.

Industry: Natural environment

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General

menstruation

Biology; General

The process in which the uterine endometrium breaks down and sheds cells, resulting in bleeding; occurs approximately once a month. The first day marks the beginning of the menstrual and ovarian ...

meristematic tissue

Biology; General

Embryonic tissue located at the tips of stems and roots and occasionally along their entire length; can divide to produce new cells; one of the four main tissue systems in plants.

midbrain

Biology; General

A network of neurons that connects with the forebrain and relays sensory signals to other integrating centers.

The middle layer of cells in embryonic development; gives rise to muscles, bones, and structures associated with reproduction. The middle embryonic tissue layer. Cells and structures arising from the ...