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Download e-book for kindle: 101 Questions About Blood and Circulation: With Answers by Faith Hickman Brynie

Posted On March 14, 2018 at 10:43 am by / Comments Off on Download e-book for kindle: 101 Questions About Blood and Circulation: With Answers by Faith Hickman Brynie

By Faith Hickman Brynie

ISBN-10: 0761397507

ISBN-13: 9780761397502

Asks and solutions questions on center, blood, and circulatory procedure. acceptable for heart institution, highschool, and non-physician adults. comprises info on middle motion, palpitations, middle assaults, leeches, transplants, blood chemistry, and the significance of nutrition, workout, and never smoking in retain cardiovascular wellbeing and fitness.

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Additional info for 101 Questions About Blood and Circulation: With Answers Straight From the Heart

Sample text

Tiny wires connect it to the heart. The second part is a sensing device that measures heart rate. When the heart rate is too slow, the sensor triggers the generator to send more impulses. When the heart beats too fast, the sensor turns off the generator. How Does the Heart Muscle Contract? Membranes surround each heart muscle cell. Proteins on the membrane carry both signals and materials into and out of the cell. Think of these proteins as pumps so tiny that they work on a molecular scale. The pumps push positive and negative ions (charged atoms) across the cell’s outer membrane.

Imagine the spin cycle on a washing machine. ) The outward force of the spin pushes the heavier components of blood to the bottom of the tube. The lighter parts stay near the surface. The result is a series of layers, one atop the other, like oil-and-vinegar salad dressing that has separated. At sea level, the hematocrit of a healthy adult man reads somewhere between 42 and 54 percent; a woman, 38 to 46 percent. A newborn’s normal values run much higher: 55 to 68 percent. These numbers represent the total volume of the red cells at the bottom of the tube plus the “buffy coat” of white cells and platelets lying just above.

Some last as long as ten or 15 years. 9 • 52 • Trailing the TAH ..... Thanks to the human heart by which we live. William Wordsworth ..... A n engineer’s specifications for the human heart might read like this: • lightweight • portable • cheap • no corrosion, breakdown, or maintenance • no rough edge or corners • acceleration/deceleration without external control • dual—separate but coordinated—pumping systems • four valves, coordinated function—no backflow, leakage, or mixing. As tall as that order seems, it’s precisely what inventors must deliver if the dream of a Totally Artificial Heart—TAH, for short—is ever to become reality.

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101 Questions About Blood and Circulation: With Answers Straight From the Heart by Faith Hickman Brynie


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