mitochondria
Explanation:
Mitochondria produces energy through the process of cellular respiration.
The hieratic scale refer to an artistic convention in which greater size indicates greater importance.
The convention of hieratic scale can be seen in various ancient Egyptian paintings of their rulers
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The nervous system is the one that coordinates and integrates the activity of le body
Many causes are responsible for lack of clean water. Water becomes polluted as a result of human factors. Humans pollute water in many ways, these include:
1. discharging of waste products from industries into the water bodies.
2. The emptying of sewage into water bodies
3. Eutrophication caused by man when water erosion carried chemicals such as fertilizers and pesticides into water bodies.
4. The occurrence of oil spillage in waters during crude oil extraction.
5. over use of water for recreational activities without making any effort to restore the water to their original state.
<span>The osteon is the fundamental functional unit of compact bone and it consists of concentric layers (lamellae), of compact bone tissue that surrounds a central canal.</span> <span>What gives a strength, hardness and rigidity to bone is the presence of mineral salt in the osteoid matrix, a complex of calcium and phosphate -hydroxyapatite. Calcified bone contains about 25% organic matrix (2-5% of which are cells), 5% water and 70% inorganic mineral (hydroxyapatite). So, <span>changes in hydroxyapatite would cause the bones to bend under a person's body weight. </span></span>
