The Earth reaches its perihelion (the point in its orbit when it is closest to the sun) during the month of January (around January 3rd currently), which falls durin â¦ g the season of winter in the northern hemisphere.
State that the most frequently occurring chemical elements in living things are carbon, hydrogen, oxygen and nitrogen. State that a variety of other elements are needed by living organisms, including sulphur, calcium , phosphorus, iron and sodium. State one role for each of the elements mentioned above. 1  Nitrogen: Required by proteins. 2  Calcium: The mineral that strengthens bone and teeth uses calcium. 3  Phosphorus: Part of the phosphate groups in ATP and DNA molecules.  Iron: found in the structure of hemoglobin and essential for the production of red blood cells.
The Importance of Oxygen. Most of us suffer from a lack of oxygen. Whether from improper breathing (see Importance of Proper breathing), poor diets, air pollution or lack of exercise, our cells are being deprived of this vital element and thus weakening our immune system. Oxygen (O2) is one of the most important elements required to sustain life. Without it, our health begins to suffer and/or we die. Unhealthy or weak cells due to improper metabolism lose their natural immunity and are thus susceptible to viruses and lead the way to all kinds of serious health problems.