Muscle & Skeletal Structures — NEET Biology

Which of the following statements regarding the joints and bones of the appendicular skeleton are correct? S1: The appendicular skeleton comprises 126 bones, including the limb bones and their associated pectoral and pelvic girdles, interconnected by various types of joints. S2: The articulation between the head of the humerus and the glenoid cavity of the pectoral girdle forms a hinge joint, primarily providing uniaxial movement. S3: The knee joint, classified as a hinge type of synovial joint, allows movement exclusively in one plane, facilitating flexion and extension of the lower leg. S4: Gliding joints, found between the carpals, are characterized by their ability to facilitate extensive rotational movements essential for wrist articulation. S5: The acetabulum of the coxal bone articulates with the head of the femur, forming a ball and socket joint that is crucial for lower limb locomotion.