Skeletal System Notes

Functions of the Skeletal System 1. Provide shape and support to body 2. Protect internal organs 3. Muscles attach to bones to move them 4. Blood cells produced in marrow of bones 5. Store minerals calcium and phosphorus for later use

Bones 206 bones in adult skeleton Each bone is an organ because it contains two or more tissues Pelvis

Joints Places where bones join together in the skeleton Two types Immovable Movable Ball and socket Hinge Gliding

Ligaments Tough bands of tissue that connect bones to other bones

Tendon Tissues that connect muscle to bone

Cartilage A smooth, flexible protein that covers the ends of bones at joints Bones form of cartilage and then harden as a child grows

Structures made of cartilage Sharks are cartilaginous fish

Marrow A flexible tissue found inside of bones that produces blood cells

Thought Question What are the functions of the skeletal system? Shape and support Protection for organs Provide muscle attachment points Form red blood cells in bone marrow Store minerals (Ca + P)

Thought Question What are the organs of the skeletal system? Bones

Thought Question What are structures of the skeletal system and their functions? Joints Places where bones join together Ligaments Bands of tissue that connects bone to bone Tendons Tissue that connects muscle to bone Cartilage Smooth and flexible tissue that covers the ends of bones Marrow Tissue inside bones that produces blood cells

Thought Question What cell organelle serves the same purpose as the organs of the skeletal system? Cell Wall – Plant cells Cell Membrane – Animal cells

Thought Question How are bones connected to bones? By ligaments How are bones connected to muscles? By tendons

Thought Question What is marrow? The tissue inside bones that produces blood cells

Thought Question What structures do freshwater, marine and terrestrial organisms have for support? Exoskeleton Calcium carbonate skeletons Silica skeletons Bony skeleton Cartilaginous skeleton

Thought Question What structures do birds have that provide support? Hollow bones that have braces or struts that cross the interior of the bone to provide strength

Movie Them not so dry bones video