ANSWER:
The "parathyroid gland" plays a large role in the "distribution of calcium and phosphate" throughout the body.
EXPLANATION:
- Parathyroid glands maintain the calcium and phosphate content in a fine range so that muscular system functions properly.
- The Parathyroid hormone secreted by this gland increases calcium levels in the blood that promote calcium conservation by the kidneys.
- This hormone also regulates the phosphate concentration and thus serves as a preventer of phosphorus proximal tubular re-absorption.