What part of the skeleton forms the extremities?

What part of the skeleton forms the extremities?

appendicular skeleton
The appendicular skeleton consists of 126 bones and includes the free appendages and their attachments to the axial skeleton. The free appendages are the upper and lower extremities, or limbs, and their attachments which are called girdles.

What are the upper extremities of the skeleton?

The upper extremity or arm is a functional unit of the upper body. It consists of three sections, the upper arm, forearm, and hand. It extends from the shoulder joint to the fingers and contains 30 bones. It also consists of many nerves, blood vessels (arteries and veins), and muscles.

What are the bones of the upper and lower limbs called?

Appendicular bones: The 126 appendicular bones are made up of 64 bones in the upper extremities (the arms, wrists, and hands) and 62 bones in the lower extremities (the legs, ankles, and feet).

What portion skeleton of the human body involves the upper and lower limbs?

The appendicular skeleton includes all the bones that form the upper and lower limbs, and the shoulder and pelvic girdles. The axial skeleton includes all the bones along the body’s long axis.

What is vertebrate skeleton?

In vertebrates the adult skeleton is usually formed of bone or cartilage—living substances that grow with the animal, in contrast to the many types of invertebrate skeleton that do not grow or are dead secretions, deposits, or crystals. The axial skeleton consists of the skull and the vertebral column.

Is composed of the upper extremity and lower extremity?

For anatomists, the upper limb consists of the arm (the upper arm), the forearm (the lower arm), and the hand. The arm consists of a single bone, the humerus. The forearm consists of two bones, the ulna and radius.

What bones does the appendicular skeleton consist of?

There are 126 named bones of the appendicular skeleton (all bones exist in pairs) [1]:

• Upper Limb.
• Shoulder girdle: Clavicle. Scapula. Arm. Humerus. Forearm. Radius. Ulna. Wrist or carpal bones. Scaphoid. Lunate.
• Lower Limb.
• Pelvic girdle (hip or coxal bone) Ilium. Ischium. Pubis. Thigh. Femur. Leg. Tibia. Fibula. Tarsal bones. Talas.

What are the four parts of the upper extremity of the appendicular skeleton?

The upper limbs include the bones of the arm (humerus), forearm (radius and ulna), wrist, and hand. The only bone of the arm is the humerus, which articulates with the forearm bones–the radius and ulna–at the elbow joint. The ulna is the larger of the two forearm bones.

What are the 4 types of skeletons?

The hydrostatic skeleton, exoskeleton, and endoskeleton support, protect, and provide movement to the bodies of different types of animals.