Four single bonds, 2- two single and one double bond, 3- one single and one triple bond, 4- two double bonds.
The shoulder (pectoral) and pelvic girdles are both structures for limb articulation. The shoulder girdles are to the upper limbs as the pelvic girdle is to the lower limbs. Shoulder girdles connect the upper arms with the axial skeleton and consist of the clavicle and scapula.
The pelvic girdles consist of the hip bones, the sacrum and the coccyx and are located between the abdomen and the thighs.
