Matrix
The nonliving component of connective tissue, consisting of a web of fibers embedded in
homogeneous ground substance that may be liquid, jellylike, or solid.
Matter
Anything that takes up space and has mass.
Maturation
The process through which an organism or body structure arrives at a state of complete
development. In dentistry, this is the point at which an individual’s teeth have reached their
full adult form, size, and function.
Maxillary
Of or relating to a jow or jawbone, especially the upper one.
Maxillary teeth
A similar structure in invertebrates, such as one of the pointed denticles or ridges on the
exoskeleton of an arthropod or the shell of a mollusk.
Mechanoreceptor
A sensory receptor that detects physical deformations in the body's environment associated
with pressure, touch, stretch, motion, and sound.
Medulla
The inner, as opposed to the outer, part of an organ, as in the adrenal gland.
Medulla oblongata
The lowest part of the vertebrate brain; a swelling of the hindbrain dorsal to the anterior
spinal cord that controls autonomic, homeostatic functions, including breathing, heart and
blood vessel activity, swallowing, digestion, and vomiting.
Medullary Rays
Haracteristic radial sheets or ribbons extending vertically, found in woods
Medusa
The floating, flattened, mouth-down version of the cnidarian body plan. The alternate form
is the polyp.
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