cardiovascular system

1. A type of blood cell that is made in the bone marrow and found in the blood and lymph tissue and helps your immune system.
6. The muscular tissue of the heart.
10. A large vein that carries blood to the heart from other areas of the body.
11. Each of the two main chambers of the heart, left and right.
12. An anatomical cavity or passage.
14. The artery carrying blood from the right ventricle of the heart to the lungs for oxygenation.

2. A type of blood cell that is made in the bone marrow and found in the blood.
3. The thin, smooth membrane which lines the inside of the chambers of the heart and forms the surface of the valves.
4. A tube that has an internal diameter of hairlike thinness.
5. A vein carrying oxygenated blood from the lungs to the left atrium of the heart.
7. The membrane enclosing the heart, consisting of an outer fibrous layer and an inner double layer of serous membrane.
8. Another term for platelet.
9. The main artery of the body
10. Any of the tubes forming part of the blood circulation system of the body, carrying in most cases oxygen-depleted blood toward the heart.
13. Any of the muscular-walled tubes forming part of the circulation system by which blood (mainly that which has been oxygenated) is conveyed from the heart to all parts of the body.