Bug Report
MAIN PULMONARY ARTERY:
Artery originating from the conus arteriosus of the right ventricle, and dividing into the right and left pulmonary arteries under the arch of the aorta. Carries deoxygenated blood to the lungs. 
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MALLEOLUS:
Rounded bone process located at either side of the ankle joint. The medial malleolus is part of the distal tibia, the lateral malleolus is the distal fibula. image
MALLEUS:
The largest auditory ossicle (small bone), which attaches to the tympanic membrane and connects to the incus. image
MAMMOGRAM:
A radiograph of the breast. image
MANDIBLE:
The lower jaw bone. image
MANDIBULAR CONDYLES:
Posterior superior process of the mandibular ramus that articulates with the mandibular fossa of the temporal bone. (You can feel this while chewing, by putting your finger in your external ear canal. image
MANUBRIUM:
The cranial part of the sternum that articulates with the first two pairs of ribs and the clavicles. image
MASSETER MUSCLE:
Muscle responsible for raising the mandible and closing the jaw. image
MASTOID AIR CELLS:
The air spaces within the mastoid process of the temporal bone. The communicate with the pharynx via the eustachian tube. image
MASTOID PROCESS:
Process projecting inferoanteriorly from the petrous portion of the temporal bone, anterior to the ear. image
MAXILLA:
The upper jaw bone that contributes to the formation of the orbit, nasal cavity, and the palate.
MAXILLARY ANTRUM:
The maxillary sinus. image
MAXILLARY ARTERY:
Originates from the external carotid artery and gives these branches: pterygoid rami, deep auricular, anterior tympanic, inferior alveolar, middle meningeal, masseteric, deep temporal, buccal, posterior superior alveolar, infraorbital, descending palatine, sphenopalatine, and artery of the pterygoid canal ("Vidian artery"). image
MAXILLARY SINUS:
One of the paransal sinuses, located on either side of the body of the maxillary bone. image
MEDIAL ARTICULAR FACET (TIBIAL PLATEAU):
The articulating surface of the proximal tibia, forming a joint with the medial and lateral condyles of the distal femur. image
MEDIAL MENISCUS:
A semicircular disk of fibrocartilage between the medial condyle and medial tibial plateau, attached to the medial margin of the superior articulating surface of the tibia. image
MEDIAL PTERYGOID PLATE:
On of a pair of projections from the greater wing of the sphenoid bone that help form the lateral wall of the nasal cavity. image
MEDULLA (Oblongata):
The cone of nerve tissue anterior to the cerebellum and connecting the pons with the cervical spinal cord. It contains nerves responsible for respiration, circulation and special senses. image
MEDULLARY CAVITY:
Within a long bone, the portion of the diaphysis containing marrow. image
MEMBRANEOUS URETHRA:
The portion of the urethra located between the pars prostatica ("prostatic urethra") and pars spongiosa ("penile urethra") in the male. image
MENGINGIOMA:
A hard-firm, slow growing, vascular tumor arising from the arachnoid, attached to the dura. Meningiomas may cause erosion and thinning of the skull, as well as hyperostosis. image
METAPHYSIS:
Portion of a long bone, usually funnel-shaped between the shaft (diaphysis) and the epiphyseal (growth) plate. This is a region of growth and remodelling during development. image
METASTATIC LESION:
The transfer of any pathologic process from one body part to another. Metastasis is usually distinguished from "local extension". Metastasis can be carried by blood-flow ("hematogenous metastasis"), by lymphatic fluid, through the CSF, along the urinary tract, etc. image
METATARSALS:
The five long tubular bones of the foot between the tarsus and the phalanges. image
METATARSAL-PHALANGEAL JOINT:
The point of junction between the metatarsals and phalanges of the foot. image
MIDBRAIN:
(Mesencephalon)The portion of the brain developed from the middle of the three primary vesicles in the embryo. In cross-section, the midbrain resembles "Mickey Mouse": the ears are the cerebral peduncles. image
MIDDLE EAR BONE COMPLEX:
The small bones (malleus("hammer"), incus ("anvil") and stapes ("stirrup"))that conduct sound from the tympanic membrane ("ear drum") to the oval window of the inner ear. image
MIDDLE COLIC ARTERY:
Artery which originates from the superior mesenteric artery, and supplies the transverse colon. image
MIDDLE SACRAL ARTERY:
The continuation of the abdominal aorta, that branches into the lowest lumbar artery. image
MRI:
Magnetic Resonance Imaging. image
MUCOSAL FOLD:
A fold of mucous membrane protruding into the lumen (cavity). image
MYELOGRAM:
A roentgenogram of the spinal cord taken after contrast material has been injected (through an LP needle) into the subarachnoid space of the spinal canal. image
MYLOHYOID MUSCLE:
Muscle which originates at the mylohyoid line of the mandible, and inserts into the body of the hyoid bone and median raphe. It elevates the hyoid bone and supports the floor of the mouth. image
