A Tooth having a somewhat Quadrangular Crown with four or Five Cusps on the Grinding Surface. In adults there are six Molars in each Jaw.
Mixed Nerve
Spinal Nerve that contains both Motor and Sensory Nerves.
Mixed Gland
Gland that secretes both Serous and Mucous secretions.
Mitral Valve
The Bicuspid Valve located between the Left Atrium and Ventricle.
Mitosis
The division process in Somatic Cells; involves the separation of the duplicated Chromosome into two identical Nuclei.
Mitochondria
Double membrane structures in the Cytoplasm; contain Enzymes required for breaking down nutrients to liberate energy for Cellular Function.
Mineralocorticoids
Hormones secreted by the Adrenal Cortex that regulate the levels of such minerals as Sodium and Potassium.
Milk Ejection Reflex
Results in Contraction of Smooth Muscles around the Mammary Ducts and Expulsion of milk, also known as Milk Let-Down Reflex.