When the skin is exposed to ultraviolet rays, the skin produces a molecule that is turned into Vitamin D.
Sun is the source of ultraviolet rays important for Vitamin D production. Due to this reason, in the case of Vitamin D deficiency, it is recommended by doctor's to absorb sunlight by skin. The Vitamin D production occurs specifically by UV B rays rays which lie in the range of 290-315 nanometer.
The chemical 7-dehydrocholesterol absorbs these rays and convert to previtamin D3. Further, previtamin D3 isomerizes to Vitamin D. Other than sunlight, Vitamin D can be taken through diet. The sources include seafood like fish, fish oil, dairy products, beef liver etc. Vitamin D is required for bone and teeth formation, muscle contraction, immune system etc.
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Answer:
lungs
Explanation:
The infant lungs and central nervous system are proceeding to develop during the third trimester that is about 34 week. The skin has grown soft and delicate, and she's stretching out and growing also rounder.
60 minutes hope this helps
Explanation:
one of the things that you can do can be drinking soemething(like a healthy protein smoothie) with protein powder but also doing like weights or pushups,etc
