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