Across
- 2. Tissue an area of tissue in the septum of the heart that conducts the wave of excitation from the atria to the base of the ventricles.
- 5. pale yellow liquid component of blood.
- 7. One auricle is attached to each of the anterior surfaces of the outer-walls of the atria (that is, the left atrium and the right atrium). Visually, they look like wrinkled pouch-like structures. Their purpose is to increase the capacity of the atrium, and so also increase the volume of blood that it is able to contain.
- 11. circulation circulation that supplies blood to all the body except to the lungs
- 14. separates the two chamber on the right of the heart from the two chambers on the left.
- 15. Systole both ventricles contract. the atrioventricular valves are pushed shut by the pressurized blood in the ventricles. the semilunar valves in the aorta and pulmonary artery are pushed open. blood flows from the ventricles into the arteries.
- 18. chaotic, irregular contractions of the heart, as in atrial or ventricular fibrillation
- 19. Node / Pacemaker a patch of muscle in the wall of the right atrium of the heart, whose intrinsic rate of rythmic contraction is faster than that of the rest of the cardiac muscle, and from which waves of excitation spread to the rest of the heart to initiate its contraction during the cardiac cycle.
- 21. Describes muscle tissue (heart muscle) that generates its own contractions.
- 23. Node a patch of tissue in the septum of the heart, through which the wave of electrical excitation is passed from the atria to the Purkyne tissue
- 26. small blood vessels that carry blood from arteries to capillaries: they determine how much blood flows through capillaries.
- 28. proteins solutes can also include protein molecules that remain in the blood at all times.
- 29. A hollow, muscular organ that pumps blood throughout the body.
- 30. Diastole relaxation of the atria
- 31. Veins the larger veins that run just beneath the collar bone.
- 32. a blood vessel that carries blood back to the heart: has a relatively thin wall and contains valves
- 33. vessels arteries, veins, capillaries
- 35. valves to keep the blood flowing in the right direction; these allow blood to move towards the heart but not away from it.
- 36. an almost colorless fluid, very similar in composition to blood plasma but with fewer plasma proteins, that is present in lymph vessels
Down
- 1. Cycle the sequence of events taking place during one heart beat.
- 3. fluid the almost colorless fluid that fills the spaces between body cells; tissue fluid forms from the fluid that leaks from blood capillaries, and most of it eventually collects into lymph vessels where it forms lymph
- 4. as blood leaves a capillary bed, the capillaries gradually join with one another, forming larger vessels called _______. These join to form veins.
- 6. a blood vessel that carries blood away from the heart: it has a relatively thick wall and contains large amounts of elastic fibers
- 8. system The transport system of the body responsible for carrying oxygen and nutrients to the body and carrying away carbon dioxide and other wastes; composed of the heart, blood vessels, and blood.
- 9. (ECG) to detect and record the waves of excitation flowing through heart muscle. electrodes can be placed on the skin over opposite sides of the heart, and the electrical potentials recorded with time.
- 10. / capillary beds the smallest type of blood vessel, whose function d to facilitate exchange of substances between the blood and the tissues: their walls are made up of a single layer of squamous epithelium , and their internal diameter is only a little larger than that of a red blood cell.
- 12. (Tunica Intima) a tissue that lines the inside of a structure , such as the inner surface of a blood vessel.
- 13. arteries on the surface of the heart these can bee seen. These branch from the aorta, and deliver oxygenated blood to the walls of the heart itself.
- 14. epithelium a layer of flattened platelike cells that cover internal and external body surfaces
- 16. valve between the left atrium and the left ventricle.
- 17. (Cardiac Muscle) the muscular tissue of the heart.
- 20. maintaining a a relatively constant environment for the cells within the body
- 22. and Closed the combination of pulmonary circulation and systemic circulation makes this; blood always remains within heart and blood vessels and is therefore known as this
- 24. valve between the right atrium and the right ventricle
- 25. cavae Running vertically on the right-hand side of the heart are the two large veins, one brining blood downwards from the head and the other bringing it up-wards from the rest of the body.
- 26. The large arterial trunk that carries blood from the heart to be distributed by branch arteries through the body.
- 27. Externa an outer layer of arteries; containing elastic fibers and collagen fibers.
- 28. veins bring blood back to the heart from the left and right lungs
- 34. / Left ventricles the lower chambers on the heart, blood flows into them from the atria, and then is squeezed out into the arteries. Blood from the left flows into the aorta and blood from the right flows into the pulmonary arteries.