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Median
The median plane is the midline longitudinal plane dividing the head and the torso into right nad left halves. The presence of the sectioned midline of the vertebral coumn and spinal cord is charcteristic of this plane. The median plane is the middle sagittal (mid-sagittal) plane.
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Sagittal
The coronal or frontal plane is a longitudinal plane dividing the body (head, torso, limbs) ori tis parts into front and back halves or parts.
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Coronal, Frontal
The coronal or frontal plane is a longitudinal plane dividing the body (head, torso, limbs) or its parts into front and back halves or parts.
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Transverse, Cross
The transverse plane divides the body into upper and lower halves or parts 9cross sections) It is perpendicular to the longitudinal planes. Transverse planes may be horizontal planes of the upright body. Transverse planes are call "axial' or "transaxial" sections/slices by radiologists.
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Cranial, Superior, Rostral
These terms refer to a structure being closer to the head or higher than another structure of the body.lThese terms are not used with respect to the limbs.
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Anterior, Ventral
These terms refer to a structure being more in front than another structure in the body. The term "anterior" is preferred.
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Posterior, Dorsal
These terms refer to a structure being more in back than another structure in the body. The term "posterior" is preferred.
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Medial
This term refers to a structure that is closer to the median plane than another structure in the body. "Medial" is not synonymous with "median".
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Lateral
This term refers to a structure that is further away from the median plan than another structure in the body.
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Proximal
Emplyed only with reference to the limbs, this term refers to a struture being closer to the median plane or root of the limb than another structure in the limb.
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Distal
Employed only with referene to the limbs, this term refers to a structure being further away from teh median plane or the root of the limb than another structure in the limb.
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Caudal, Inferior
These terms refer to a structure being closer to the feet or the lower part of the body than another structure in teh body. These terms are not used with respect to the limbs.
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Superficial, Deep
The term "superficial" is synonymous with external, the term "deep" with internal. Related to the reference point on the chest wall, a structure closer to the surface of the body is superficial; a structure furhter away from the surface is deep.
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Ipsilaterl, Contralateral
The term "ipsilateral" means "on the same side' (in htis case, as thereferce point); "contraletral" means "on the opposite side" of the reference point.
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Orbital
eye, cavity/walls
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Anterior Cervical
front of neck
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Lateral Cervical
side of neck
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Supraclavicular
above clavicle
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Perineal
between pubis and coccyx
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Deltoid
shoulder/upper arm
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Antecubital
front of elbow
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Parietal
top and sides of head
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Post. cervical/Nuchal
back of neck
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Paraspinal
along side spinal column
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Sacroiliac
vertebro-pelvic joint
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Deltoid
shoulder/upper arm
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Hand: Dorsal
back of hand
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Cranial Cavity
Occupied by the brain and its coverings, cranial nerves, and blood vessels. The bony walls are lined by the dura mater.
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Vertebral Cavity
Houses the spinal cord, its coverings, related vessels, and nerve roots. Dura mater is continouous with cranial dura at the faramen magnum.
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Thoracic Cavity
contains the lungs, heart, and other structures (tubular airways, blood vessels, lymphatics, nerves) in the chest. The roof of the cavity is membranous, the floor is the muscular thoracic diaphragm. The middle has the mediastinum that separates it into left and right parts. The internal surface of each is lined with a serous membrane called pleura.
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Abdominal Cavity
contains the gastrointestinal tract and related glands, the urinary tract, and great numbers of vessels and nerves, has muscular walls anterolaterally, the lower ribs and muscle laterally, and the lumbar vertebrae posteriorly. The roof isi the thoracic diaphragm. The abdominal and pelvic cavity are continous and share the muscular pelvic floor.
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Pelvic cavity
contains the urinary bladder, rectum, and reproductive organs, has muscular walls anteriorly, bony walls laterally, and the sacrum posteriorly. The internal surface is lined by a serous membrane called the peritoneum.
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Epiphysis
the end of a long bone or any part of a bone separated from teh main body of an immature bone by cartilage. It is largely cencellous bone, and its articulating surgace is lined with 3-5 mm of hyaline (articular) cartilage. The epiphysis is supplied by vessels from teh joint capsule.
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Diaphysis
the diaphysis is the shaft or central part of a long bone, It has marrow-filled cavity (medullary cavity) surrounded by compact bone which is lined externally by periosteum and internally by endosteum.
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Articular Cartilage
smooth, slippery, porous, malleable, insensitive, and bloodless. the degenerative process of arthritis involves the breakdown and fibrillation of articular cartilage.
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Periosteum
fibrous, cellular, vascular, and highly sensitive life support sheath for bone, providing nutrient blood for bone cells and a source of osteoprogenitor cells. It does not cover articular cartilage.
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Cancellous (Spongy) Bone
consists of interwoven beams (trabeculae) of bone in the epiphyses of long bones, the bodies of the vertebrae, and other bones without cavities. The spaces are filled with red or yellow marow and blood vessels.
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Compact Bone
dense bone characerized in long bones by microscopic hollow cylinders of bone (haversian systems) interwonev with non-cylindrical lamellae of bone. It forms the stout walls of the diaphysis of long bones and the thinner outer surface of other bones whre there is no articular cartilage-e.g., the flat bones of the skull.
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Medullary cavity
cavity of the diaphysis. It contains marrow: red in the young, turning to yellow in many long bones in maturity. It is lined by endosteal tissue (thin connective tissue with many osteoprogenitor cells).
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Red Marrow
Red, gelatinous substance composed of red and white blood cells in a varitey of developmental forms 9hematopoietic tissue) and specialized capillaries (sinusoids) enmeshed in reticular tissue. In adults, red marrow is generally limited to the sternum, vertebrae, hip bones, clavicles, and cranial bones.
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Yellow Marrow
fatty connective tissue that is not productive of blood cells. It replaces red marrow in the epiphyses and medullary cavities of long bones, and cancellous bone of other bones.
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Nutrient Artery/ Branches
principal artery and major supplier of oxygen and nutrients to the shaft or body of a bone; its branches snake through the labyrinthine cnals of the haversian systems and other tubular cavitis of bones.
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Axial Skeleton
Skull, vertebrae, sternum, ribs and hyoid bone
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Appendicular Skeleton
pectoral and pelvic girdles, bones of the arms, forearms, wrists, hands, thighs, legs, and feet.
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Fibrous joint
Synarthroses- in articulating bones connected by fibrous tissue.
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Gomphoses
teeth in their sockets
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Syndesmoses
partly movable fibrous joints
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Cartilaginous joint
synchondroses- immovable joints seen during growth
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Ampiarthroses
partly movable-intevertebral disc
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Symphyses
partly movable fibrocartilagious joints
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Synovial joint
diarthroses-freely movable withinligamentous limits and the bony architecture.
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Types of synovial joints
Ball & Socket; Hinge; Saddle; Ellipsoid; Pivot; Gliding
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Cranial Bones
Occipital; Parietal; Frontal; Temporal; Ethmoid; Sphenoid
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Facial Bones
Nasal; Vomer; Lacrimal; Zygomatic; Palatine; Maxilla; Mandible; Inferior Nasal Concha
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