Zusammenfassung der Ressource
SKELETON SYSTEM
- Bones
- Humans have 26 bones
- Hard and resistant, formed by cells and surrounded by calcium carbonate
- Inside we have the BONE CARROW, where blood cells are produced
- Joints
- Place where 2 or more bones meet.
- 1) Immovable joints
- no movement --> skull
- 2) Freely movable joints
- limited movement, separated by cartilaginous tissue --> vertebral column
- 2) Slighty movable joints
- free movement, sperated by ligaments --> knee