Across
- 2. the red liquid that circulates in the arteries and veins of humans and other vertebrate animals, carrying oxygen to and carbon dioxide from the tissues of the body
- 3. a device for controlling the passage of fluid or air through a pipe, duct, etc
- 5. denoting a tooth with three cusps or points.
- 10. supply, treat, charge, or enrich with oxygen
- 13. a bright red substance formed by the combination of haemoglobin with oxygen, present in oxygenated blood
- 15. a rhythmical throbbing of the arteries as blood is propelled through them, typically as felt in the wrists or neck
- 16. the pulsation of the heart
- 18. 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
- 19. shaped like a half-moon or crescent
- 20. suffering from anaemia
Down
- 1. the colourless fluid part of blood, lymph, or milk, in which corpuscles or fat globules are suspended
- 2. having two cusps or points
- 4. a colourless cell which circulates in the blood and body fluids and is involved in counteracting foreign substances and disease
- 6. a red protein responsible for transporting oxygen in the blood of vertebrates
- 7. a red blood cell, which (in humans) is typically a biconcave disc without a nucleus
- 8. a device for stimulating the heart muscle and regulating its contractions
- 9. any of the fine branching blood vessels that form a network between the arterioles and venules
- 11. the pressure of the blood in the circulatory system
- 12. remove oxygen from
- 14. a large vein carrying deoxygenated blood into the heart
- 17. any of the tubes forming part of the blood circulation system of the body, carrying mainly oxygen-depleted blood towards the heart