PHTY101 Lecture Notes - Lecture 6: Inferior Vena Cava, Xiphoid Process, Hyaline
Document Summary
12 pairs of ribs: 7 true, 3 false, 2 floating. Joint of the sternum: fibro cartilaginous, slightly moveable. Joint of the ribs: 1st joint (rib 1): hyaline cartilaginous, immoveable, rest: synovial, small range, glides and twists. Joint of the ribs: hyaline cartilaginous, immoveable. Costovertebral: synovial, multiaxial, plane, ligaments, radiate: from head of rib to body of vertebra above and vertebra of same number and intervening iv disc. Intra-articular: from head of rib to iv disc, divides cavity into two. Costotransverse: synovial, multiaxial, plane, ligaments, superior costotransverse ligament: from neck of rib to transverse process of vertebra above. Movements of ribs: bucket handle: out and up, pump handle: forwards and upwards. Inferior vena cava: goes through at level t8, opened by diaphragm contraction. Intercostals: external layer- more geared towards inspiration (still turned on in exp) Internal layer- more geared towards expiration (still turned on in insp) Innermost layer: stiffen the space between the ribs, role in breathing and posture.
