| Mumps Vaccine |
| Mumps virus |
| Munc18 Proteins |
| Munchausen Syndrome |
| Munchausen Syndrome by Proxy |
| Muntjacs |
| Mupirocin |
| Muramic Acids |
| Muramidase |
| Muramoylpentapeptide Carboxypeptidase |
| Murexide |
| Muridae |
| Murinae |
| Murine Acquired Immunodeficiency Syndrome |
| Murine hepatitis virus |
| Murine pneumonia virus |
| Muromegalovirus |
| Muromonab-CD3 |
| Murraya |
| Musa |
| Musaceae |
| Muscarine |
| Muscarinic Agonists |
| Muscarinic Antagonists |
| Muscidae |
| Muscimol |
| Muscle Cells |
| Muscle Contraction |
| Muscle Cramp |
| Muscle Denervation |
| Muscle Development |
| Muscle Fatigue |
| Muscle Fibers |
| Muscle Fibers, Fast-Twitch |
| Muscle Fibers, Slow-Twitch |
| Muscle Hypertonia |
| Muscle Hypotonia |
| Muscle Neoplasms |
| Muscle Proteins |
| Muscle Relaxants, Central |
| Muscle Relaxation |
| Muscle Rigidity |
| Muscle Spasticity |
| Muscle Spindles |
| Muscle Tonus |
| Muscle Weakness |
| Muscle, Skeletal |
| Muscle, Smooth |
| Muscle, Smooth, Vascular |
| Muscles |
| Muscular Atrophy |
| Muscular Atrophy, Spinal |
| Muscular Diseases |
| Muscular Disorders, Atrophic |
| Muscular Dystrophies |
| Muscular Dystrophies, Limb-Girdle |
| Muscular Dystrophy, Duchenne |
| Muscular Dystrophy, Emery-Dreifuss |
| Muscular Dystrophy, Facioscapulohumeral |
| Muscular Dystrophy, Oculopharyngeal |
| Musculocutaneous Nerve |
| Musculoskeletal Abnormalities |
| Musculoskeletal Development |
| Musculoskeletal Diseases |
| Musculoskeletal Equilibrium |
| Musculoskeletal Manipulations |
| Musculoskeletal Physiologic Phenomena |
| Musculoskeletal Physiologic Processes |
| Musculoskeletal Physiology |
| Musculoskeletal System |
| Musculoskeletal, Neural, and Ocular Physiology |
| Mushroom Bodies |
| Mushroom Poisoning |
| Music Therapy |
| Mustard Compounds |
| Mustard Gas |
| Mustard Plant |
| Mustelidae |
| Mutagenesis |
| Mutagenesis, Insertional |
| Mutagenesis, Site-Directed |
| Mutagenicity Tests |
| Mutagens |
| Mutant Chimeric Proteins |
| Mutant Proteins |
| Mutation |
| Mutation, Missense |
| Mutism |
| MutS DNA Mismatch-Binding Protein |
| MutS Homolog 2 Protein |