A&P Axial Skeleton

44 terms by smithdraws

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axial skeleton

what portion of the skeleton includes the skull, thoracic (rib)- cage, & the vertebral column?

7

how many vertebrae make up the cervical region

thoracic

name the vertebral region that forms the superior back and articulates with the ribs

12

how many vertebrae make up the thoracic region

lumbar

name the vertebral region that forms the inferior, "lower" back

5

how many vertebrae make up the lumbar region

sacrum

name the five fused vertebrae that attaches the axial skeleton to the pelvic girdle of the appendicular skeleton

coccyx

name the 3-4 fused vertebrae that articulate inferiorly with the sacrum

occipital condyles of the skull

with what features does atlas articulate superiorly?

axis C2

name the cervical vertebra that allows the head to shake "NO"

dens (odontoid process), large spinous process

name two prominent features of the axis/C2 vertebra

transverse ligament

name the structure that binds the dens of the axis to the inner surface of the anterior arch of atlas.

vertebra prominens/C7

name the landmark vertebra at the base of the neck

ligamentum nuchae

name the structure that originates at C7 and holds the head up without muscular effort

sacral canal

name the feature of the sacrum that extends the entire length of the bone, and continues the vertebral canal

median sacral crest

name the ridge formed by the fused spinous processes of the sacral vertebrae.

sacral cornua

name the feature of the sacrum formed by the disconnected laminae of the fifth sacral vertebra.

sacral hiatus

name the feature of the sacrum adjacent to the sacral cornua that forms the opening at the inferior end of the sacral canal.

sacral foramina

name the four pairs of holes on either side of the median sacral crest

lateral sacral crest

name the ridge formed by the fused transverse processes of the sacral vertebrae

auricular surface

name the flat sacral area, lateral & anterior to the superior portion of the lateral sacral crest

pelvic girdle/sacroiliac joint

name the point of articulation of the sacral auricular surface where the axial skeleton meets the lower appendicular skeleton

apex

name the narrow inferior portion of the sacrum

base

name the broad superior portion of the sacrum

sacral promontory

name the prominent bulge at the anterior tip of the sacral base

ala

name the "wing" features flanking either side of the sacral base

coccygeal cornua

name the feature of the coccyx formed by the laminae that curve to meet the sacral cornua

sternum

give the anatomical term for the breastbone

manubrium

name the part of the sternum that articulates with the clavicles & the cartilages of the first pair of ribs

gladiolus

name the part of the sternum attached inferiorly to the manubrium, where costal cartilages from ribs 2-7 attach

xiphoid process

name the part of the sternum attached inferiorly to the gladiolus, where the diaphragm & rectus abdominis muscles attach. this is the smallest part of the sternum.

thorax

what body cavity includes the sternum, ribs & costal cartilage?

12 pairs

there are how many pairs of ribs?

vertebrosternal ribs

what name is given to the first 7 pairs of ribs

costal cartilages

name the extensions that attach the first seven ribs to the sternum

jugular notch

name the indentation at the superior border of the manubrium

vertebrochondral ribs

what name is given to the 3 pairs of ribs (8, 9, 10) that share a cartilage connection to the sternum

false ribs

what name is given to rib pairs 8-12 since they do not attach directly to the sternum

ribs 8, 9, 10

which rib pairs fuse and merge with the cartilage of rib pair 7

floating/vertebral ribs

what name is given to rib pairs 11 & 12 since they do not attach to the sternum or other ribs

head of rib

what rib feature articulates with two demifacets of thoracic vertebrae

tubercle

what rib feature articulates with the transverse process of thoracic vertebrae

body/shaft

what rib feature begins curving toward the sternum

costal cartilage

what rib feature attaches ribs to the sternum, provides flexibility & is made of hyaline cartilage

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