mandible - ANSWERS-The bone of the lower jaw.
manubrium - ANSWERS-The upper quarter of the sternum.
maxillae - ANSWERS-The upper jawbones that assist in the
formation of the orbit, the nasal cavity, and the palate and hold the
upper teeth.
medial - ANSWERS-Parts of the body that lie closer to the midline;
also called inner structures.
medulla oblongata - ANSWERS-Nerve tissue that is continuous
inferiorly with the spinal cord; serves as a conduction pathway for
ascending and descending nerve tracts; coordinates heart rate, blood
vessel diameter, breathing, swallowing, vomiting, coughing, and
sneezing.
midbrain - ANSWERS-The part of the brain that is responsible for
helping to regulate the level of consciousness.
midsagittal plane (midline) - ANSWERS-An imaginary vertical line
drawn from the middle of the forehead through the nose and the
umbilicus (navel) to the floor.
,minute volume - ANSWERS-The amount of air that moves in and out
of the lungs per minute minus the dead space. Also called minute
ventilation.
motor nerves - ANSWERS-Nerves that carry information from the
central nervous system to the muscles of the body.
mucous membranes - ANSWERS-The lining of body cavities and
passages that communicate directly or indirectly with the environment
outside the body.
mucus - ANSWERS-The opaque, sticky secretion of the mucous
membranes that lubricates the body openings.
musculoskeletal system - ANSWERS-The bones and voluntary
muscles of the body.
myocardium - ANSWERS-The heart muscle.
nasopharynx - ANSWERS-The nasal cavity; formed by the union of
facial bones and protects the respiratory tract from contaminants.
nervous system - ANSWERS-The system that controls virtually all
activities of the body, both voluntary and involuntary.
,norepinephrine - ANSWERS-A neurotransmitter and drug sometimes
used in the treatment of shock; produces vasoconstriction through its
alpha-stimulator properties.
occiput - ANSWERS-The most posterior portion of the cranium.
oncotic pressure - ANSWERS-The pressure of water to move,
typically into the capillary, as the result of the presence of plasma
proteins.
orbit - ANSWERS-The eye socket, made up of the maxilla and
zygoma.
oropharynx - ANSWERS-Forms the posterior portion of the oral
cavity, which is bordered superiorly by the hard and soft palates,
laterally by the cheeks, and inferiorly by the tongue.
ovaries - ANSWERS-The primary female reproductive organs that
produce an ovum, or egg, that, if fertilized, will develop into a fetus.
palmar - ANSWERS-The forward facing part of the hand in the
anatomic position.
pancreas - ANSWERS-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.
, parasympathetic nervous system - ANSWERS-A subdivision of the
autonomic nervous system, involved in control of involuntary,
vegetative functions, mediated largely by the vagus nerve through the
chemical acetylcholine.
parietal regions - ANSWERS-The areas between the temporal and
occipital regions of the cranium.
patella - ANSWERS-The kneecap; a specialized bone that lies within
the tendon of the quadriceps muscle.
pathophysiology - ANSWERS-The study of how normal physiologic
processes are affected by disease.
perfusion - ANSWERS-Circulation of blood within an organ or tissue
in adequate amounts to meet current needs of the cells.
peripheral nervous system - ANSWERS-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.
peristalsis - ANSWERS-The wavelike contraction of smooth muscle
by which the ureters or other tubular organs propel their contents.
plantar - ANSWERS-The bottom surface of the foot.