appendicular skeleton

Examples of appendicular skeleton in the following topics:

• The Appendicular Skeleton

• The Appendicular Skeleton

• Overview of the Appendicular Skeleton

  • In the human body, the appendicular skeleton is unfused (unlike the axial skeleton), which allows for a much greater range of motion.
  • The appendicular skeleton is composed of 126 bones.
  • Note that these areas may include other bones that are not a part of the appendicular skeleton; they are instead a part of the axial skeleton.
  • The femur, tibia, patella, and fibula are all a part of the appendicular skeleton.
  • The appendicular skeleton is composed of the six major regions shown here.

• Divisions of the Skeletal System: Axial and Appendicular

  • The skeletal system is divided into two distinct divisions: the axial skeleton and the appendicular system.
  • As a result, an average adult skeleton consists of 206 bones .
  • It is a complex structure with two distinct divisions: the axial and the appendicular skeletons.
  • The appendicular skeleton is composed of 126 bones in the human body.
  • Differentiate the purpose and the number of bones of the axial and appendicular skeletons

• Human Appendicular Skeleton

  • The appendicular skeleton supports the attachment and functions of the upper and lower limbs of the human body.
  • The human appendicular skeleton is composed of the bones of the upper limbs (which function to grasp and manipulate objects) and the lower limbs (which permit locomotion).
  • The pelvic girdle attaches to the lower limbs of the axial skeleton and is responsible for bearing the weight of the body and for locomotion.
  • It is securely attached to the axial skeleton by strong ligaments.
  • The appendicular skeleton is composed of the bones of the pectoral limbs (arm, forearm, hand), the pelvic limbs (thigh, leg, foot), the pectoral girdle, and the pelvic girdle.

• Overview of the Axial Skeleton

  • The axial skeleton consists of the 80 bones along the central axis of the human body.
  • The axial skeleton consists of the 80 bones along the central axis of the human body.
  • The axial skeleton and the appendicular skeleton together form the complete skeleton.
  • The human rib cage, also known as the thoracic cage, is a bony and cartilaginous structure which surrounds the thoracic cavity and supports the pectoral girdle, forming a core portion of the human skeleton.

• Types of Skeletal Systems

  • There are three different skeleton designs that provide organisms these functions: hydrostatic skeleton, exoskeleton, and endoskeleton.
  • Although a hydrostatic skeleton is well-suited to invertebrate organisms such as earthworms and some aquatic organisms, it is not an efficient skeleton for terrestrial animals.
  • The skeletal system in vertebrates is divided into the axial skeleton (which consists of the skull, vertebral column, and rib cage), and the appendicular skeleton (which consists of the shoulders, limb bones, the pectoral girdle, and the pelvic girdle).
  • The skeleton of the red-knobbed sea star (Protoreaster linckii) is an example of a hydrostatic skeleton.
  • The skeletons of humans and horses are examples of endoskeletons.

• Human Axial Skeleton

  • The axial skeleton forms the central axis of the human body and consists of the skull, vertebral column, and thoracic cage.
  • The function of the axial skeleton is to provide support and protection for the brain, spinal cord, and organs in the ventral body cavity.
  • It also provides a surface for the attachment of muscles that move the head, neck, and trunk; performs respiratory movements; and stabilizes parts of the appendicular skeleton, which will be discussed later.
  • The thoracic cage, also known as the ribcage, is the skeleton of the chest.
  • The axial skeleton consists of the bones of the skull, ossicles of the middle ear, hyoid bone, vertebral column, and rib cage.

• The Axial Skeleton

• The Axial Skeleton