human bones stack and skeletonsThe human skeleton is a complex framework made up of 206 bones in an adult body, providing structure, protection, and support. Here's an overview of the key components and their arrangement:
Categories of BonesAxial Skeleton:
Skull: Composed of 22 bones, including the cranial bones (protecting the brain) and facial bones.Vertebral Column: Consists of 33 vertebrae, including the cervical (7), thoracic (12), lumbar (5), sacral (5, fused into the sacrum), and coccygeal (4, fused into the coccyx) regions.Rib Cage: Includes 12 pairs of ribs and the sternum, protecting the thoracic cavity and vital organs like the heart and lungs.Appendicular Skeleton:
Shoulder Girdle: Comprised of the clavicles (collarbones) and scapulae (shoulder blades), connecting the arms to the torso.Upper Limbs: Each arm has 30 bones, including the humerus (upper arm), radius and ulna (forearm), and the bones of the wrist and hand (carpals, metacarpals, and phalanges).Pelvic Girdle: Formed by the two hip bones (os coxae), which connect the lower limbs to the spine and support the weight of the upper body.Lower Limbs: Each leg contains 30 bones, including the femur (thighbone), tibia and fibula (lower leg), and the bones of the ankle and foot (tarsals, metatarsals, and phalanges).