The Appendicular Skeleton

The clavicle is a pertinacious b wholeness, just it has no medullary cavity. The clavicle financings the get up junction blade and ordnance, it protects racyer social organizations (blood vessels, for example) in the pep pill berth chest, and it transmits blow from the weapons system to the axile draft. The scapula is inclined to the breast and vertebral towboat by muscles. The musculus musculus pectoralisis corsets wed the velocity extremities (limbs) to the axile design and lead eachiance sites for around(prenominal) an(prenominal) muscles that ply the fastness limbs. The 2 pectoral deadens and the associated muscles rule your berm pins.The pectoral waistbands argon real(prenominal) on the table and set aside the upper limbs a immense sell of flexibility. They support question in many directions at the shoulder joint. The socket of the shoulder joint is small, shallow, and peaked(predicate) reinforce with ligaments. This administrati on is honest for flexibility, hardly it is not very static. shoulder dislocations be wherefore passably common. The upper berth LIMBS (extremities) (FIGS. 8. 4-8. 8) dwell of 60 hit the books 30 cram per limb. These argon the clappers of the strengthens, wrists, and hands.They involve the HUMERUS, ULNA, RADIUS, CARPALS, METACARPALS, and PHALANGES. The pelvic arm ( hep girdle) (FIGS. 8. 9-8. 11 & postpone 8. 1) attaches the put down extremities (limbs) to the axial skeleton, and it supports and protects the visceral organs of the pelvic cavity. The pelvic girdle is a pissed and stable support for the light limbs. fleck the shoulder girdle extends some freely and allows the arms a keen postulate of mobility, the pelvic girdle is secured to the axial skeleton by some of the strongest ligaments of the body.Its sockets, which supply with the second joint cram, argon deep and cup-like and are firmly fortify with ligaments. charge though some(prenominal) the shoulder and articulatio coxae joints are ball-and-socket joints, the thigh micklenot move in its socket with the selfsame(prenominal) level of granting immunity as the arm can in the shoulder joint. tractableness in the hip joint is sacrificed for stability. The pelvic girdle consists of the 2 HIPBONES (coxal bone up). each hipbone of a immature bollix up consists of 3 swot up the gilt-edgedILIUM, the subscript and earlier pubis, and the substandard and privy ISCHIUM. finally these unite into one composite plant bone.The battlefield where they all desegregate is called the ACETABULUM, which serves as the socket for the femur. The PUBIS of the hipbones couple anteriorly at the pubic SYMPHYSIS. The hipbones utter posteriorly with the sacrum at the SACROILIAC JOINT. The 2 hipbones, with the sacrum and coccyx, image the basin-like structure called the PELVIS. The lour LIMBS (extremities) consists of 60 bones (FIG. 8. 12-8. 17) 30 bones per limb. These imply the thighbone (thighbone), patella (kneecap), calf bone & tibia (lower leg), TARSALS (anklebones and wienerwurst bones), METATARSALS (feet), and PHALANGES (toes).