The Earth is closest to the Sun, or at the Perihelion, about two weeks after the December Solstice, when it is winter in the Northern Hemisphere. Conversely, the Earth is farthest away from the Sun, at the Aphelion point, two weeks after the June Solstice, when the Northern Hemisphere is enjoying warm summer months.
Mitochondria are essential components of nearly all cells in the body. These organelles are the powerhouses for cells, providing energy to carry out biochemical reactions and other cellular processes.Mitochondria make energy for cells from the chemical energy stored in the food we eat.itochondria are essential components of nearly all cells in the body. These organelles are the powerhouses for cells, providing energy to carry out biochemical reactions and other cellular processes.
1 Mitochondria are semiâautonomous organelles that are descendants of endosymbiotic bacteria. 2  Mitochondria play a pivotal role in cellular energy production through the mitochondriaâhoused pathways of citric acid cycle, fatty acid oxidation, respiration and oxidative phosphorylation (OXPHOS).ey Concepts. 1  Mitochondria are semiâautonomous organelles that are descendants of endosymbiotic bacteria. 2  Mitochondria play a pivotal role in cellular energy production through the mitochondriaâhoused pathways of citric acid cycle, fatty acid oxidation, respiration and oxidative phosphorylation (OXPHOS).