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Science ch 2
lesson 1
Term | Definition |
---|---|
What does the skeleton do? | provides shape and support, enables you to move, protects your organs, produces blood cells , and stores minerals and other things |
skeleton | bones that make up your body |
vertebrae | 26 bones that make up your back bone |
What role doe joints play? | joints allow bones to move in different ways |
joints | place where 2 bones meet |
immovable joints | connect bones but allow little or no movement |
movable joints | allow body to move differently and made up of ligaments |
ligaments | made of strong connective tissue and hold together the movable joints |
What are the characteristics of bones? | complex living structures that grow and repair themselves and are lightweight. |
compact bone | hard and dense but not solid, found beneath the membrane |
spongy bone | lightweight but strong, under the compact bone |
marrow | connective tissue |
yellow bone marrow | found in a space in the middle of bone and stores fat |
red bone marrow | fills the spaces in some spongy bone and produces most of blood cells |
cartilage | strong connective tissue fore flexible then bone |
osteoporosis | condition in which bones become weak and break easily |