Question

2. Label the figure below bluedoor LLC 000IVVVV9000 (a) Anterior (b) Posterior Figure 8.29. The human seton. The appendicular skeleton is colored UUUUUUUUU 196 S tal system. The Appendicular Skeleton Laboratory

Answer 1

The human skeleton is the internal framework of the human body. It is composed of around 270 bones at birth – this total decreases to around 206 bones by adulthood after some bones get fused together.  The axial skeleton is formed by the vertebral column, the rib cage, the skull, and other associated bones.

1] scapula;  the scapula, also known as the shoulder bone, is the bone that connects the humerus (upper arm bone) with the clavicle (collar bone).

2] hip bones; ilium; The ilium is the uppermost and largest part of the hip bone. sacrum; The sacrum is a shield-shaped bony structure that is located at the base of the lumbar vertebrae and that is connected to the pelvis. The sacrum forms the posterior pelvic wall and strengthens and stabilizes the pelvis.

3] femur bone; Femur, also called thighbone, the upper bone of the leg or hind leg. The head forms a ball-and-socket joint with the hip (at the acetabulum), being held in place by a ligament (ligamentum teres femoris) within the socket and by strong surrounding ligaments.

4] tibia; The tibia is a large bone located in the lower front portion of the leg. and is the second-largest bone in the body.

5] fibula; The fibula is the long, thin and lateral bone of the lower leg. and plays a significant role in stabilizing the ankle and supporting the muscles of the lower leg.

6] clavicle bone; The clavicle, or collarbone, is a long bone that serves as a strut between the shoulder blade and the sternum (breastbone). There are two clavicles, one on the left and one on the right. The clavicle is the only long bone in the body that lies horizontally.

7] pelvic girdle; The pelvic girdle is a ring-like bony structure, located in the lower part of the trunk. It connects the axial skeleton to the lower limbs.

8] Humerus; The humerus is the long bone in the upper arm. It is located between the elbow joint and the shoulder.

9] radius bone; The radius or radial bone is one of the two large bones of the forearm, It extends from the lateral side of the elbow to the thumb side of the wrist and runs parallel to the ulna.

10] ulna bone; The ulna is one of two bones that give structure to the forearm. The ulna is located on the opposite side of the forearm from the thumb. It joins with the humerus on its larger end to make the elbow joint and joins with the carpal bones of the hand at its smaller end.

11] carpals; The carpal bones are the eight small bones that make up the wrist (or carpus) that connects the hand to the forearm. The carpal bones allow the wrist to move and rotate vertically.

12] phalanges: The bones of the fingers. There are generally three phalanges (distal, middle, proximal)

Bones of the hand;

1] trapezoid; The trapezoid bone is a carpal bone in tetrapods, including humans. It is the smallest bone in the distal row of carpal bones that give structure to the palm of the hand.

2] capitate; is the largest of the carpal bones and occupies the center of the wrist. It presents, above, a rounded portion or head, which is received into the concavity formed by the scaphoid and lunate; a constricted portion or neck; and below this, the body.

3] middle phalanx; The middle phalanges, also known as the intermediate phalanges, are bones located in the fingers. Each intermediate phalanx connects to a proximal and distal phalanx.

4] metacarpus; In human anatomy, the metacarpal bones or metacarpus, form the intermediate part of the skeletal hand located between the phalanges of the fingers and the carpal bones of the wrist which forms the connection to the forearm.

5] scaphoid; The scaphoid bone is one of the carpal bones of the wrist. It is situated between the hand and forearm on the thumb side of the wrist. It forms the radial border of the carpal tunnel.

6] hamate hook; The hook of the hamate is found at the proximal, ulnar side of the hamate bone. The hook is a curved, hook-like process that projects 1–2 mm distally and radially. The hook forms the ulnar border of the carpal tunnel, and the radial border for Guyon's canal.