Ch7 Heart and blood

2. One of two blood collecting chambers in the human heart; blood flows from veins into here
3. Substances in the body that fight bacteria and disease-causing organisms
5. The system that carries oxygen and nutrients to all cells in the body and takes wastes away from the cells (two words)
8. The major artery leaving the heart; this artery then branches into smaller arteries to carry oxygen-rich blood to the body cells
10. A vein leading from the lungs which carries blood back to the heart (two words)
12. Fluid from body tissues, which returns to the circulatory system through special vessels that link to form the lymphatic system
13. A small, fine network of narrow blood vessels in the body, linking arteries to veins
14. One of two muscular chambers in the human heart that force blood from the heart into the arteries
15. The liquid or fluid part of the blood

1. An artery leading from the right ventricle which branches to carry blood to the lungs (two words)
2. Vessels or tubes that carry blood away from the heart
4. Component of blood, responsible for clotting
6. The process in which water evaporates from the surface of a leaf
7. Foreign substances in the body; these can be bacteria and other disease-causing organisms, or the toxins or poinsons produced by them
9. The tubes or vessels in a plant that carry water from the roots to the leaves
10. The tubes or vessels in a plant that carry the products of photosynthesis to where they are needed
11. Vessels or tubes that carry blood towards the heart; these tubes contain valves which allow blood to flow in one direction only
14. Either of two large veins that carry deoxygenated blood into the right atrium of the heart