Browse the glossary using this index

Special | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | ALL

Page:  1  2  3  4  (Next)


alveolar process of the mandible

upper border of mandibular body that contains the lower teeth

alveolar process of the maxilla

curved, inferior margin of the maxilla that supports and anchors the upper teeth

angle of the mandible

rounded corner located at outside margin of the body and ramus junction

angle of the rib

portion of rib with greatest curvature; together, the rib angles form the most posterior extent of the thoracic cage

anterior (ventral) sacral foramen

one of the series of paired openings located on the anterior (ventral) side of the sacrum

anterior arch

anterior portion of the ring-like C1 (atlas) vertebra

anterior cranial fossa

shallowest and most anterior cranial fossa of the cranial base that extends from the frontal bone to the lesser wing of the sphenoid bone

anterior longitudinal ligament

ligament that runs the length of the vertebral column, uniting the anterior aspects of the vertebral bodies

anulus fibrosus

tough, fibrous outer portion of an intervertebral disc, which is strongly anchored to the bodies of the adjacent vertebrae

appendicular skeleton

all bones of the upper and lower limbs, plus the girdle bones that attach each limb to the axial skeleton

articular tubercle

smooth ridge located on the inferior skull, immediately anterior to the mandibular fossa


first cervical (C1) vertebra

axial skeleton

central, vertical axis of the body, including the skull, vertebral column, and thoracic cage


second cervical (C2) vertebra


body of the rib

shaft portion of a rib

brain case

portion of the skull that contains and protects the brain, consisting of the eight bones that form the cranial base and rounded upper skull



(also, skullcap) rounded top of the skull

carotid canal

zig-zag tunnel providing passage through the base of the skull for the internal carotid artery to the brain; begins anteromedial to the styloid process and terminates in the middle cranial cavity, near the posterior-lateral base of the sella turcica

cervical curve

posteriorly concave curvature of the cervical vertebral column region; a secondary curve of the vertebral column

cervical vertebrae

seven vertebrae numbered as C1–C7 that are located in the neck region of the vertebral column

clavicular notch

paired notches located on the superior-lateral sides of the sternal manubrium, for articulation with the clavicle


small bone located at inferior end of the adult vertebral column that is formed by the fusion of four coccygeal vertebrae; also referred to as the “tailbone”

condylar process of the mandible

thickened upward projection from posterior margin of mandibular ramus


oval-shaped process located at the top of the condylar process of the mandible

coronal suture

joint that unites the frontal bone to the right and left parietal bones across the top of the skull

coronoid process of the mandible

flattened upward projection from the anterior margin of the mandibular ramus

costal cartilage

hyaline cartilage structure attached to the anterior end of each rib that provides for either direct or indirect attachment of most ribs to the sternum

costal facet

site on the lateral sides of a thoracic vertebra for articulation with the head of a rib

costal groove

shallow groove along the inferior margin of a rib that provides passage for blood vessels and a nerve

cranial cavity

interior space of the skull that houses the brain


cribriform plate

small, flattened areas with numerous small openings, located to either side of the midline in the floor of the anterior cranial fossa; formed by the ethmoid bone

crista galli

small upward projection located at the midline in the floor of the anterior cranial fossa; formed by the ethmoid bone



bony projection (odontoid process) that extends upward from the body of the C2 (axis) vertebra


ear ossicles

three small bones located in the middle ear cavity that serve to transmit sound vibrations to the inner ear

ethmoid air cell

one of several small, air-filled spaces located within the lateral sides of the ethmoid bone, between the orbit and upper nasal cavity

ethmoid bone

unpaired bone that forms the roof and upper, lateral walls of the nasal cavity, portions of the floor of the anterior cranial fossa and medial wall of orbit, and the upper portion of the nasal septum

external acoustic meatus

ear canal opening located on the lateral side of the skull

external occipital protuberance

small bump located at the midline on the posterior skull



small, flattened area on a bone for an articulation (joint) with another bone, or for muscle attachment

facial bones

fourteen bones that support the facial structures and form the upper and lower jaws and the hard palate

false ribs

vertebrochondral ribs 8–12 whose costal cartilage either attaches indirectly to the sternum via the costal cartilage of the next higher rib or does not attach to the sternum at all

floating ribs

vertebral ribs 11–12 that do not attach to the sternum or to the costal cartilage of another rib


expanded area of fibrous connective tissue that separates the brain case bones of the skull prior to birth and during the first year after birth

foramen lacerum

irregular opening in the base of the skull, located inferior to the exit of carotid canal

foramen magnum

large opening in the occipital bone of the skull through which the spinal cord emerges and the vertebral arteries enter the cranium

foramen ovale of the middle cranial fossa

oval-shaped opening in the floor of the middle cranial fossa

foramen rotundum

round opening in the floor of the middle cranial fossa, located between the superior orbital fissure and foramen ovale

foramen spinosum

small opening in the floor of the middle cranial fossa, located lateral to the foramen ovale

frontal bone

unpaired bone that forms forehead, roof of orbit, and floor of anterior cranial fossa

Page:  1  2  3  4  (Next)