{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

CHP8 The Skeletal System

Margin arc of lower ribs expands costal protects

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: / 4 Anterior body transverse lines leading to sacral foramina transverse sacral • Ala= llateral ‘wings’ ateral • Sacral canal= runs thru sacrum & houses spinal nerve runs root endings root Coccyx/Thoracic Cage Coccyx/Thoracic Coccyx (Co1-Co4)- small, triangular bone of 4 fused vert’s small, (~20-30 yrs) (~20-30 • • • Attachment site for muscles of pelvic floor Vestige of a tail (mammals) Cornua= hornlike projections on Co1 for ligaments hornlike attaching coccyx to sacrum attaching • Fractured by fall or during childbirth Thoracic cage- T1-T12, sternum, ribs; encloses lungs & T1-T12, heart & attachment for pectoral girdle/upper limbs heart • Expands for breathing, costal margin (arc of lower ribs) Expands costal protects spleen, liver, kidneys protects Sternum Sternum Sternum= manubrium, body, xiphoid process • Manubrium= broad superior bone, suprasternal notch & broad suprasternal clavicular notches clavicular • Body= llongest part, scalloped lateral margins for ongest attachment of costal cartilage of ribs 2-7 attachment • Angle= pt where body joins w/ manubrium • Xiphoid= small, pointed bone for small, attachment of ab muscles muscles Ribs Ribs Ribs= 12 prs; 1-7 true ribs, 8-12 false ribs, & 11-12 floating 12 true false floating ribs ribs • Attach to vertebra @ proximal end of rib…distal end is Attach attached to sternum by costal cartilage costal • Head (articulates w/ vertebra body), neck, tubercle tubercle (art...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online