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Skeletal System Notes. Your body has two organ systems that work together to provide support & help you move– the skeletal system & the muscular system. The skeletal system is made up of bones & cartilage that for the framework of your body.
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Your body has two organ systems that work together to provide support & help you move– the skeletal system & the muscular system.
The skeletal system is made up of bones & cartilage that for the framework of your body.
The muscular system includes the muscles that help you move & help things inside your body move.
-to protect internal organs -to work with the muscles to move
A human baby is born with 350 bones, but an adult human has 206 bones.
Bones are very much alive & contain blood vessels & nerve tissue.
Cartilage is a strong flexible connective tissue found at end of bones where they act as a cushion.
Cartilage has no blood cells so it must absorb nutrients from body fluids. (diffusion)
Bones are attached to other bones by connective tissues called ligaments.
A joint is the place where two bones come together & are joined by ligaments to allow bones to move in different ways.
Pivot joint • Bones rotate around each other (allows side-to-side motion)
Examples… Neck
Gliding joint • Bones slide over each other (allows you to bend & flex)
Examples… Wrist, ankle, vertebrae (back)
Hinge joint Back-and-forth motion (can only move one direction… unable to twist)
Examples… Knee, elbow, fingers, toes, jaw
Ball & socket joint Rotational or circular motion… greatest range of motion
Examples… Shoulder, hip
The best way to keep your bone healthy are regular exercise & to eat a balanced diet with meats, beans, green leafy vegetables & dairy products.
Osteoporosis is the condition where mineral loss causes bones to become weak & break easily.
Cranium Pelvis