body systems

4. where digestion starts
5. large muscular sac tht continues mechanical and chemical digestion
7. allows air to pass to and from lungs
8. organ where most nutrient absorption takes place
11. blood cells that carry oxygen from the lungs to the body cells
14. absorbs water
15. tiny finger-like structures that cover the inside of the small intestine where food is absorbed

1. a blood cell that fights disease
2. the passages that direct air into the lungs
3. a cell fragment that plays a roll in forming scabs
6. smallest blood vesicle that connects artery s and veins-where stuff is being delivered and picked up.
9. lower chamber of the heart
10. tiny sacs of lung tissue specialized in the movement of gasses between air and blood
12. liquid part of blood
13. uper chamber of the heart