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Central Canal (Haversian Canal) |
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Definition
runs parallel to the long axis of the bone and carries blood vessels, nerves, and lymphatic vessels through the bone matrix.
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Definition
Mature bones cells[image] |
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The chambers in the osteocytes[image] |
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Concentric circles around the central canal[image] |
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Remnants of circumferential lamellae that have been broken down. In between concentric lamellae to keep osteocytes packed in together.[image] |
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Osteon (Haversian system) |
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Definition
A central canal and all the concentric lamellae surrounding it[image] |
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Tiny canals radiating outward from a central canal to the lacunae of the first lamella and then from lamella to lamella.[image] |
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Perforating Canals (Volkmann's Canals) |
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Definition
Canals that run at right angles to the shaft and complete the communication pathway between the bone interior and its extrenal surface.[image] |
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Bones of the skull that enclose and protect the fragile brain tissue |
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Bones of the skull that support the eyes and position them anteriorly. They also provide attatchment for facial muscles. |
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Anterior portion of the cranium; forms the forehead, superior part of the orbit, and the floor of anterior cranial fossa.[image] |
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Supraorbital Foramen (notch) |
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Definition
Opening above each orbit allowing blood vessels and nerves to pass.[image] |
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Smooth area between the eyes[image] |
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Midline articulation point of the two parietal bones[image] |
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Definition
Point of articulation of parietals with frontal bone[image] |
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Inferior to the parietal bone on lateral skull (temples)[image] |
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Definition
Point of articulation of the temporal bone with the parietal bone.
[image] |
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A bridgelike projection joining the zygomatic bone (cheekbone) anteriorly.[image] |
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Rounded depression on the inferior surface of the face of the zygomatic process (anterior to the ear); forms the socket for the condylar process of the mandible, where the mandible (lower jaw) joins the cranium.[image] |
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Definition
Canal leading to eardrum and middle ear[image] |
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Stylo = stake, pointed object
Needle-like projection inferior to external acoustic meatus; attatchment point for muscles and ligaments of the neck.[image] |
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Rough projection inferior and posterior external acoustic meatus; attatchment site for muscles[image] |
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Most posterior bone of the cranium--forms floor and back wall. Joins sphenoid bone anteriorly via its narrow basilar part.[image] |
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Site of articulation of occipital bone and parietal bones.[image] |
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Large opening in base of occipital, which allows the spinal cord to join with the brain. |
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Rounded projections lateral to the foramen magnum that articulate with the first cervical vertebrae (atlas).
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Bat-shaped bone forming the anterior plateau of the middle cranial fossa across the width of the skull. It is the keystone of the cranium because it articulates with all other cranial bones.
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Larger portions of the spheniod seen exteriorly anterior to the temporal and forming part of the eye orbits. |
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Definition
Smaller portions of the spheniod anterior to the sella turcica (turk's saddle). |
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Term
Sella Turcica (Turk's Saddle) |
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Definition
A saddle-shapped region in the spheniod midline. The seat of the saddle, called the hysphenoid midline, surrounds the pituitary gland. |
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Definition
Irregularly shaped bone anterior to the sphenoid. Forms the roof of the nasal cavity, upper nasal septum, and part of the medial orbit walls
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The lower jawbone, which articulates with the temporal bones in the freely movable joints of the skull. |
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Horizontal portion; forms the chin
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Vertical extension of the body on either side
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Articulation point of the mandible with the mandibular fossa of the temporal bone
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Jutting anterior portion of the mandibular ramus; site of muscle attacthment
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Definition
Prominent opening on the body (lateral to the midline) that transmits the mental blood vessels and nerve to the lower jaw.
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Term
Alveolar Process (mandible) |
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Definition
Superior margin of mandilble; contains sockets in which the teeth lie.
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Definition
Anterior median depression indicating point of mandibular fusion
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Definition
Two bones fused in a median suture; form the upper jawbone and part of the orbits. All facial bones, except the mandible, join the this. Thus, they are the main, or keystone bones of the face.
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Term
Aveolar Process (maxillae) |
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Definition
Inferior margin containing sockets in which the teeth lie
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Definition
Form the anterior hard palate; meet medially in the intermaxillary suture.
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Definition
Opening under the orbit carrying the infraorbital nerves and blood vessels to the nasal region.
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Fingernail sized bones formin a part of the medial orbit walls between the maxillae and the ethmoid. Each bone is pierced by an opening (lacrimal fossa) which serves as a passageway for tears.
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Paired bones posterior to the palatine processes; for posterior hard palate and part of the orbit; meet medially at the median palatine suture.
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Definition
Lateral to the Maxillae; forms the portion of the face commonly called the cheekbone, and forms part of the lateral orbit. Its three processes are named for the bones with which they articulate.
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Definition
Small rectangular bones forming the bridge of the nose.
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Vomer= plow
Blade shaped bone in median plane of the nasal cavity that forms the posterior and inferior nasal septum
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Term
Inferior Nasal Conchae (Turbinates) |
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Definition
Thin curved bones protruding medially from the lateral walls of the nasal cavity; serve the same purpose as the turbiante portions of teh ethmoid bone.
[image] |
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Term
What four bones contain the sinuses? |
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Definition
Maxillary, spheniod, ethmoid, and frontal |
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Bone in the throat above the larynx. Serves as a point of attatchment or many tongue and neck muscles. it does not articulate with any other bone and is thus unique.
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Extending from the skull to the pelvis, forms the body's major axial support. Additionally it surrounds and protects the delicate spinal cord while allowing the spinal nerves to emerge from the cord via openings between adjacent vertebrae. |
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24 of these bones create the vertebral column and are connected in a way as to provide a flexible curved structure. |
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Composed of pedicles and laminae, and a spinous process, it represents the junction of all posterior extensions from the vertebral body
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Definition
Rounded central portion of the vertebrae, which faces anteriorly in the human vertebral column.
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Term
Vertebral Foramen (spinal foramen) |
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Definition
Opening enclosed by the body and vertabral arch; a passageway for the spinal cord. |
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Definition
Two lateral projections from the vertebral arch
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Single medial and posterior projections from the vertebral arch
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Term
Superior and Inferior Articular Processes |
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Definition
Paired projections lateral to the vertebral foramen that enable articulation processes typically face toward the spinous process (posteriourly), whereas the inferior articular processes face (anteriorly) away from the spinous process.
Top and bottom nobs (condyles) of the vertebrae that allow each to sit on each other properly.
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Notches in the right and left pedicles on the inferior and superior surfaces that create opeings for spinal nerves to leave the spinal cord between adjacent vertebrae.
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Form the neck portion of the vertebral column
7
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Term
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Definition
C1
First vertebrae; highly modified to perform special functions. It lacks a body, and its lateral processes contain large concave depressions on their superior surfaces that recieve the occipital condyles of the skull (enabling you to nod).
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Definition
C2
Second vertebrae; modified to perform special functions. It acts as a pivot for the rotation of the atlas (and skull).
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Definition
Serves as a pivot point on the axis vertebrae. It articulates C1 and C2, allowing you to rotate your head from side to side (King tut's was fused).
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The chest portion of the vertebrae
12
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Lower Back part of spine
5
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Definition
Composite bone formed from the fusion of five vertebrae. It articulates superiorly with L5 and inferiorly with the coccyx.
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Formed form the fusion of three to five small irregularly shaped vertebrae. It is the human tailbone. It is attached to the sacrum by ligaments
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Definition
Consists of the bony thorax, which is composed of the sternum, ribs, and thoracic vertebrae, plus the costal cartilages. It protects the organs of the thoracic cavity.
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Typical flat bone, a result of the fusion of 3 bones. It is attatched to the first 7 pairs of ribs.
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Definition
Looks like the knot of a tie; it articulates with the clavical laterally. Top portion of the sternum[image] |
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Definition
Forms the bulk of the sternum. Looks like the long part of the tie
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Constructs the inferior end of the sternum and lies at the level of the fifth intercostal space. It is made of hyaline cartilage in children but ossifies in adulthood.
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Term
How many pairs of ribs are there? |
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Definition
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Where do the heads of the ribs connect? |
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Definition
Anteriorly on the vertebral column (via their tubercles). They then curve downward and toward the anterior body surface.
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The first seven pairs that attatch directly to the sternum via cartilage; "true" ribs |
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Definition
Rib pairs 8-10 that attatch to the ribcage via the costal cartilage of rib pair 7 |
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Definition
Inferior 5 rib pairs that do not attatch directly to the sternum |
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Term
Vertebral Ribs (floating ribs) |
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Definition
Last 2 pairs of ribs that do not attatch at all to the sternum but rather "float" |
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Definition
Fibrous membranes connecting the skull bones at birth; a baby's "soft spot"
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Stub of bone that connects the lamina to the vertebral body to create the vertebral arch.
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Part of the vertebrae that connects to the spinous process.
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