Final answer:
Phosphorus is the element concentrated in bone, cartilage, and cells. It is essential for energy production, carbohydrate metabolism, protein synthesis, neuromuscular activity, and clotting mechanism.
Step-by-step explanation:
The element concentrated in the bone, cartilage, and cell, and required for the use of Adenosine triphosphate (ATP) as a source of energy, is phosphorus. Phosphorus is necessary for carbohydrate metabolism, protein synthesis, and the contraction of muscular tissue. It also regulates neuromuscular activity and the clotting mechanism. Additionally, phosphorus is a major constituent of bones and teeth and is found in body cells and tissues, such as muscles and liver.