Across
- 3. a red substance that contains oxygen
- 4. Circulation of blood
- 6. a chamber of the heart which receives blood from an atrium and from which blood is forced into the arteries
- 7. conditions that affect your heart and blood vessels
- 11. a very small vein, especially one collecting blood from the capillaries.
Down
- 1. cells responsible for generating contractile force in the intact heart
- 2. vessels tubes which blood flow
- 5. a organ that pumps blood
- 7. any of the fine branching blood vessels that form a network between the arterioles and venules.
- 8. give rich oxygen to body
- 9. one of the two upper chambers in the heart that receives blood from the circulatory system
- 10. carry blood to the heart