There must be a balance between the flow of energy into the atmosphere and the flow of energy out of the atmosphere and back to space.<span>After being warmed by incoming solar radiation throughout the day, the Earth emits infrared radiation, which is trapped near the Earth’s surface by carbon dioxide.This radiation is called thermal radiation.</span>
The Major function of the respiratory system is to exchange oxygen and carbon dioxide. Inhaled oxygen enters the lungs and reaches the alveoli, the layers of the cells lining the alveoli and the surrounding capillaries are each only one cell thick and are in very close contact with each other, the barrier between air and blood averages about 1 micron in thickness. Oxygen diffuses quickly through the air-blood barrier into the blood in the capillaries. Similarly, carbon dioxide passes from the blood into the alveoli and is then exhaled.
The world could lose a fifth of its African elephant population in 10 years. ...
Radioisotopes tell scientists that the earth is 4.5 billion years old.
<span>Cell membrane is comprised of phospholipids (its major component ) which can create lipid bilayers because of their water attracting characteristics. Another lipid inside the cell membrane is </span>cholesterol, <span>which makes the cell membrane more fluid. Cholesterol is a waxy fat-like substance found in all cells of the body. </span>
<span>When you have a high cholesterol, it can create a plaque in your arteries thus, develop a high risk of heart disease. People who have high cholesterol has a greater possibility to acquire coronary heart diseases.</span>
