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Lumbar Spine
The lower part of the back, formed by the lowest five nonfused vertabrae; also called the dorsal spine
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Lumbar Vertebrae
Vertebrae of the lumbar spine
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Mandible
The bone of the lower jaw
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Manubrium
The upper quarter of the sternum
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Mastoid Process
A prominent bony mass at the base of the skull behind the ear
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Maxillae
The upper jawbones that assist in the formation of the orbit, the nasal cavity, and the palate, and lodge the upper teeth
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Medial
Parts of the body that lie closer to the midline; also called inner structures
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Metabolism
The sum of all the physical and chemical processes of living organisms; the process by which energy is made available for the uses of the organism
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Midaxillary Line
An imaginary vertical line drawn through the middle of the axilla (armpit), parallel to the midline
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Midclavicular Line
An imaginary vertical line drawn through the middle portion of the clavicle and parallel to the midline
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Midline
An imaginary vertical line drawn from the middle of the forehead through the nose and the umbilicus to the floor
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Motor nerves
Nerves that carry information from the central nervous system to the muscles of the body
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Mucous Membranes
The lining of body cavities and passages that communicate directly or indirectly with the environment outside the body
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Mucus
The opaque, sticky secretion of the mucus membranes that lubricates the body openings
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Musculoskeletal System
The bones and voluntary muscles of the body
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Myocardium
The heart muscle
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Nasopharynx
The part of the pharynx that lies above the level of the roof of the mouth, or soft palate
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Nervous System
The system that controls virtually all activities of the body, both voluntary and involuntary
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Occiput
The most posterior portion of the cranium
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Orbit
The eye socket, made up of the maxilla and zygoma
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Oropharynx
A tubular structure that extends vertically from the back of the mouth to the esophagus and trachia
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Ovary
A female gland that produces sex hormones and ova (eggs)
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Palmar
The front region of the hand
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Pancreas
A flat, solid organ that lies below the liver and the stomach; it is a major source of digestive enzymes and produces the hormone insulin
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Parietal Regions
The areas between the temporal and occiput regions of the cranium
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Patella
The kneecap; a specialized bone that lies within the tendon of the quadraceps muscle
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Perfusion
The circulation of oxygenated blood within an organ or tissue in adequate amounts to meet the cells' current needs
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Peripheral Nervous System
The part of the nervous system that consists of 31 pairs of spinal nerves and 12 pairs of cranial nerves. These peripheral nerves may be sensory nerves, motor nerves, or connecting nerves
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Peristalsis
The wave-like contraction of smooth muscle by which the ureters or other tubular organs propel their contents
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Pinna
The external, visible part of the ear
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