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Synthesis of the active hormone formed from vitamin D or its precursor in skin.
The pancreas. This organ sits just below the stomach and is both an exocrine and an endocrine gland.
Vertebral compression Fractures of the spine (vertebra) can cause severe ”band-like” pain that radia
Relationships and dates divergence of living primate group based on molecular and DNA comparisons.
In this painting evangelist George Whitefield appears to be cross-eyed. This is no fault of John Wol
Eighteen-year-olds were the largest age cohort in the first year of the war in both armies. Soldiers