Across
- 2. the colorless fluid part of blood, lymph, or milk, in which corpuscles or fat globules are suspended.
- 6. each of the two main chambers of the heart, left and right.
- 10. any of various nearly colorless cells of the immune system that circulate mainly in the blood and lymph and participate in reactions to invading microorganisms or foreign particles.
- 11. a red protein responsible for transporting oxygen in the blood of vertebrates.
- 12. any of the tubes forming part of the blood circulation system of the body, carrying in most cases oxygen-depleted blood toward the heart.
Down
- 1. a small colorless disk-shaped cell fragment without a nucleus, found in large numbers in blood and involved in clotting.
- 3. each of the two upper cavities of the heart from which blood is passed to the ventricles.
- 4. any of the muscular-walled tubes forming part of the circulation system by which blood is conveyed from the heart to all parts of the body.
- 5. one of the cells of the blood, which in mammals are enucleate disks concave on both sides, contain hemoglobin, and carry oxygen to the cells and tissues and carbon dioxide back to the respiratory organs.
- 7. any of the fine branching blood vessels that form a network between the arterioles and venules.
- 8. a blood protein produced in response to and counteracting a specific antigen. Antibodies combine chemically with substances that the body recognizes as alien, such as bacteria, viruses, and foreign substances in the blood.
- 9. a toxin or other foreign substance that induces an immune response in the body, especially the production of antibodies.