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D 1.1 Skeletal D 1.1 Skeletal SystemSystemWhat does the Skeletal System do?What does the Skeletal System do?
Skeletal SystemSkeletal System
Bones are livingBones are living Skeletal system has five functionsSkeletal system has five functions Gives shape and supportGives shape and support Protects internal organsProtects internal organs Muscles attach to bonesMuscles attach to bones Blood cells are formed in the marrowBlood cells are formed in the marrow Stores calcium and phosphorusStores calcium and phosphorus
Skeletal SystemSkeletal System
206 bones in the human body206 bones in the human body Compact bone – contains bone cells, blood Compact bone – contains bone cells, blood
vessels, and calcium depositsvessels, and calcium deposits Spongy bone – small, open spaces to make Spongy bone – small, open spaces to make
bones lightweightbones lightweight Marrow – in spongy bone and produces red Marrow – in spongy bone and produces red
blood cellsblood cells Cartilage – flexible bone that aids in motionCartilage – flexible bone that aids in motion Ligament – connects bone to bone at jointsLigament – connects bone to bone at joints
Skeletal SystemSkeletal System
Joints – place where bones meetJoints – place where bones meet Immovable joint – skullImmovable joint – skull Ball and socket – shoulder, hipBall and socket – shoulder, hip Hinge – knee, elbowHinge – knee, elbow Gliding – vertebrae, wristGliding – vertebrae, wrist Pivot – arm, legPivot – arm, leg
Cranium
Mandible
Skull
Clavicle
Scapula
Sternum
Humerus
Rib cage
VertebralColumn
Radius
UlnaForearm
Pelvis
Carpals
Metacarpals
PhalangesFemur
Patella
Tibia
Fibula
Tarsals
Phalanges
Metatarsals