Skeletal System Video

How many bones are in an adult human body? 206

Function of the Skeletal System Support- framework that supports body and cradles its soft organs Protection- for delicate organs, heart, lungs, brain Movement- bones act as levers for muscles Mineral storage- calcium & phosphate Blood cell formation- hematopoiesis (Bone Marrow)

Types of Bones Long Bones- metacarpals, metatarsals, phalangies, humerus, ulna, radius, tibia, fibula & femur Short Bones- carpals, tarsals Flat Bones- rib, scapula, skull, sternum Irregular Bones- vertebrae, some facial bones Sesamoid- patella

Bone Classification

Type of Bone Joints Pivot (Ex: neck between C1 and C2 vertebrae- rotation, flexion, extension, abduction, adduction) Ball & Socket (Ex: shoulder, hip- flexion, extension, abduction, adduction, rotation,) Hinge (Ex: elbow, knee- flexion, extension) Saddle (Ex: thumb- flexion, extension, adduction, abduction) Gliding (Ex: ankle- flexion extension, rotation) Condyloid (Ex: wrist- flexion, extension, abduction adduction)

Axial Skeleton

Appendicular Skeleton

Axial Skeleton

The Vertebral Column Cervical Vertebrae (7) Thoracic Vertebrae (12) Axial Skeleton The Vertebral Column Cervical Vertebrae (7) Thoracic Vertebrae (12) Lumbar Vertberae (5) Sacrum Coccyx

Cervical Vertebrae

Axial Skeleton Sacrum & Coccyx

The Thoracic Cage Sternum True Ribs (7) False Ribs (3) Axial Skeleton The Thoracic Cage Sternum True Ribs (7) False Ribs (3) Floating Ribs (2)

Bones of the Pectoral Girdle Appendicular Skeleton Bones of the Pectoral Girdle

Appendicular Skeleton Humerus Ulna Radius 8 Carpals 5 Metacarpals 14 Phalanges

Humerus

Ulna & Radius

Hand Bones

Appendicular Skeleton Pelvis

Male vs Female Pelvis                                                   Female Pelvic Girdle Male Pelvic Girdle

Appendicular Skeleton The Lower Limb (Legs) Femur Patella Tibia Fibula 7 Tarsals 5 Metatarsals 14 Phalanges

Femur

Patella

Knee Joint

Tibia & Fibula

Foot phelangies metatarsals tarsals tarsals metatarsals phelangies