M-line
Macrophage
Macula densa cells
Maximal stimulus
Mean arterial pressure (MAP)
Mechanical energy
Mediastinum
Medulla
Medullary collecting duct
Membrane potential
Metabolic acidosis
Metabolic alkalosis
Metabolic rate
Metabolism
Microvilli
Milliequivalents per liter (mEq/L)
Millimolar (mmol/L)
Millivolt (mV)
Mitochondrion
mM (millimole)
Molarity (M)
Molecules
Motor end plate
Motor neuron
Motor unit
Mt. Whitney
Multipolar neuron
Muscarine
Muscarinic receptor
Muscle fatigue
Muscle fiber
Muscle tone
Muscle twitch
Muscular artery
Muscular pump
mV or millivolt
Myelin sheath
Myelinated axon
Myelination
Myofibril
Myofilaments
Myoglobin
Myosin