The axial and appedicular skeleton essay

Axial skeleton image

The bones of vertebrates are composed of tissues, whereas sponges have no true tissues. Review Name the major regions of the skeleton and describe their relative functions. Mineral and growth factor storage. Progress in the science of prosthesis design has resulted in the development of artificial joints, with joint replacement surgery in the hips and knees being the most common. Propose a reason why the ribs are attached anteriorly by cartilage. The scapulae are flat, triangular bones that are located at the back of the pectoral girdle. Appendicular skeleton: 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.

These can make movement difficult; in advanced cases, they completely impair mobility. The upper limb consists of the arm, the forearm, and the wrist and hand. Examples are long bones of the limbs, vertebral column and ribs.

Are hip bones axial or appendicular

An example would be the leg which is a large and long bone and the femur is joined to the fibula and tibia. Exoskeletons are external skeletal systems that are made up of chitin and calcium carbonate. At the distal end, the femur, tibia, and patella form the knee joint. We begin life with approximately 33 vertebrae, but as we grow, several vertebrae fuse together. The eight cranial bones include the frontal bone, two parietal bones, two temporal bones, the occipital bone, the sphenoid bone, and the ethmoid bone. This type of skeletal system is found in soft-bodied animals such as sea anemones, earthworms, Cnidaria, and other invertebrates. Fourteen facial bones form the face, provide cavities for the sense organs eyes, mouth, and nose , protect the entrances to the digestive and respiratory tracts, and serve as attachment points for facial muscles. The sternum breastbone , scapulae shoulder blades , ribs, and most skull bones are flat bones. Cartilage prevents the bone ends from rubbing directly on each other. There are three different skeleton designs that provide organisms these functions: hydrostatic skeleton, exoskeleton, and endoskeleton. The pelvis joins together in the anterior of the body the pubic symphysis joint and with the bones of the sacrum at the posterior of the body.

Bones of the Appendicular skeleton: 4 bones in the shoulder girdle clavicle and scapula each side 6 bones in the arm and forearm humerus, ulna, and radius 58 bones in the hands carpals 16, metacarpals 10, phalanges 28 and sesamoid 4 2 pelvis bones 8 bones in the legs femur, tibia, patella, and fibula 56 bones in the feet tarsals, metatarsals, phalanges, and sesamoid Resources.

The 21 fused bone are separated in children to allow the skull and brain to grow but fused to give an adult outstanding protection of the brain Learning Objectives Summarize the structure and role of the musculoskeletal system Key Takeaways Key Points The skeleton, muscles, cartilage, tendons, ligaments, joints, and other connective tissues are all part of the musculoskeletal system, which work together to provide the body with support, protection, and movement.

At the distal end, the femur, tibia, and patella form the knee joint.

axial and appendicular skeletons

Some sesamoid bones act to alter the direction of pull of a tendon. The ossicles of the ear keep the human body balanced.

Label axial and appendicular skeleton

The Skull The bones of the skull support the structures of the face and protect the brain. The skull consists of 22 bones, which are divided into two categories: cranial bones and facial bones. What is its function? The fibula, or calf bone, parallels and articulates with the tibia. It also contains critical components of the hematopoietic system blood cell production. Organisms with an endoskeleton are supported by a hard, mineralized skeletal system that resides inside the body. All limb bones except the patella kneecap and the wrist and ankle bones are long bones. During ossification the changing of cartilage to bone which begins before birth, the cartilage is broken down and the resulting space is filled by bone building mineral salts and protein fibres secreted by bone cells. It also has deep sockets with robust ligaments to securely attach the femur to the body. They support the muscles crossing the shoulder joint.

Of the bones in the human body of these make up the appendicular skeleton. Malnutrition and arthritis are examples of disorders and diseases in the body that can severely impair the function of the musculoskeletal system.

Examples include the vertebrae and the hip bones. The mandible articulates with the base of the skull, controling the opening to the airway and gut. The Axial and the Appendicular.

axial and appendicular skeleton worksheet

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.

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The Axial & Appendicular Skeleton