Bones.

• The knee is a hinge  joint.
• Ulna is your arm bone and it is a long bone.
• Cartilage is made up of collagen and elastin, covers the ends of the bones- reduces friction at joints-prevents bone to bone contact and general wear and tear of bones and acts as a shock absorber
• Cartilage function found at the end of bones.
• Tendons functions attach muscles to bones
• Tendons have no movement. They are very strong- due to thickness. Have high tensile strength- they wont snap easily under strain.
• Ligaments functions- attach bone to bones.
• Ligaments consist of dense collagenous fibres and elastin- can withstand great pressure. Due to presence of elastin have a degree of elasticity. Allow movement in multiple directions. Have less tensile strength than tendons.
• Bones structure:

  -compact bone tissue.

  -spongy bone tissue contains red marrow and yellow marrow
• red marrow are where blood cells can be made such as red blood cells, white blood cells, platelets
• yellow marrow stores fat for long term energy store