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Skeletal and Muscular System. Skeletal System. Axial Skeleton – supports the central axis of the body Skull Clavicle Ribs and Sternum Vertebrae Appendicular Skeleton Arms Legs. Skeletal System. Skull – protects the brain Clavicle – hold the upper extremities of the hand
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Skeletal System • Axial Skeleton – supports the central axis of the body • Skull • Clavicle • Ribs and Sternum • Vertebrae • Appendicular Skeleton • Arms • Legs
Skeletal System • Skull – protects the brain • Clavicle – hold the upper extremities of the hand • Ribs and Sternum – protects the heart and the lungs
Skeletal System • Vertebrae – protects the spinal cord
Skeletal System • Arms • Humerus • upper arm • Radius and Ulna • lower arm • Carpals • wrist • Metacarpals • palm • Phalanges • fingers
Skeletal System • Legs • Femur • thigh • Tibia and Fibula • Lower leg • Tarsals • ankle • Metatarsals • sole • Phalanges • toes
Skeletal System • Bone Structure • Periosteum • covering of the bone • Important for repair • Compact Bone • makes the bone tough • Spongy Bone • Provide spaces for bone marrow • Bone Marrow • Red marrow – production of blood cells • Yellow marrow – composed of fats
Muscular System • Muscles work in pairs (antagonistic) • Myofibrils • Filaments • Actin – thin fiber • Myosin – thick fiber • Sliding Filament Theory
Muscular and Skeletal System • Allows movement • Gives shape to the body • Gives structure to the body
Muscular and Skeletal System • Osteoporosis • Osteoporosis means “porous bones,” or that bones are losing their density, becoming thinner and more breakable.
Muscular and Skeletal System • Rheumatoid Arthritis • Rheumatoid arthritis causes swelling, pain, stiffness, and redness in the joints. • The cause of rheumatoid arthritis is unknown to date, but allegedly triggered by a combination of factors, including genetic susceptibility, viral infection or hormonal changes.
Muscular and Skeletal System • Scoliosis • an abnormal curvature of the spine. • Can be a result of poor muscle control or muscle weakness, and traumatic spine injuries
Muscular and Skeletal System • Steroids • Testosterone is commonly prescribed in the treatment of female breast cancer, and for stimulation of growth, weight gain, and red blood cell production. These are commonly known as "anabolic steroids" because they promote muscle growth. They are also commonly used to help patients recover from a surgery and cancer treatment that resulted in damage to muscle tissue.