What vitamin is synthesized by the skin? Explain why this vitamin is critical for various physiological processes.Four-year-old Susie loves carrots. Her skin has turned orange from a pigment found in carrots called beta carotene. Briefly explain how long it will take for Susie’s skin to return to its normal color and why.Why should a surgeon cut along the tension (cleavage) lines when performing surgery?Christina’s fair skin flushes red when she exercises. What is the name of this condition and why does her skin appear red? Biology Science Physiology BIO 202