Across
- 4. / Functions of the heart is to _____ blood around the body.
- 9. /The thickness of capillary.
- 10. / Veins return blood _______ the heart.
- 11. /Humans have double circulation, which means blood flows through the heart ____ in one complete circulation.
- 14. / The only blood vessel which contains valve.
- 16. /The 2 lower chambers of the heart is knowns as _____ .
- 17. /Arteries transport blood ____ from the heart
- 18. /Pulmonary circulation has ___ pressure because the blood only has to be transported from the heart to the lungs only.
- 19. /The atrioventricular valve found in the right side of the heart is also known as _________ valve.
- 21. /Capillary network is the site of ______ of substances.
Down
- 1. /The elasticity of the artery walls helps push the blood in _____ which gives rise to pulse in the arteries.
- 2. /Valves function to prevent ______ of blood.
- 3. /The movement of blood in veins are assisted by the action of ____ muscles.
- 5. / All arteries carry oxygenated blood except for ______ _____ and umbilical arteries.
- 6. /The valves found in the arteries leading away from the heart are called __________ valve.
- 7. / The 2 upper chambers of the heart is known as _____
- 8. /Animals which breathe without lungs have _____ circulation.
- 12. / The heart is surrounded by a membrane called ______ .
- 13. /The atrioventricular valve found in the left side of the heart is also known as _________ valve.
- 15. /When the content of blood plasma has been moved out of the capillaries, it is called ______ .
- 20. /The vein walls are thin as they contain less muscle, so the blood in vein flows _____ and smoothly.