Homework Help: Science: Biology: Human Bones

1. Parts of a bone

• Outer coat - Protects the bone from breaking.
• Rings of minerals - Minerals from rings around blood vessels.
• Marrow - Makes blood vessels.

2. Joints - The connection of two or more bones.

• Ball and socket - Gives full circular motion.
  Examples:
  - femur and pelvis
  - shoulder
• Fixed Joint
  Examples:
  - skull
  - sternum and ribcage
• Hinge Joint - Swings open like a door hinge.
  Examples:
  -wrist
  -elbow
  -knee
  -foot
  -jaw

Ligament - Sheets of material that holds bones together at a joint.

Cartilage - Tough, flexible material that joins part of your skeleton.

Homework Help: Science: Biology

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