1. 0 que sao vitaminas e por que são essenclais para funcionam ento do organismo humano? 2. Qualé a principal função da vitamina D no corpo humano e o que pode ocorrer em caso de sua deficiência? 3. Explique a importância da vitamina C no sistema imunológico e no processo de cicatrização de feridas.

1. Vitamins are organic compounds that are essential for the normal functioning of the human body. They are necessary for various metabolic processes and help to prevent certain diseases. Vitamins are found in foods such as fruits, vegetables, meat, fish and dairy products. There are 13 essential vitamins that the human body needs, and they are classified into two groups: fat-soluble vitamins (A, D, E and K) and water-soluble vitamins (B-complex and C).<br /><br />2. The main function of vitamin D in the human body is to help the body absorb calcium and phosphorus from the food we eat. This is important for the development and maintenance of strong bones and teeth. In case of vitamin D deficiency, it can lead to a condition called rickets in children, which is characterized by soft and deformed bones. In adults, it can cause osteomalacia, a condition that affects the bones and muscles, causing them to become weak and soft.<br /><br />3. Vitamin C is an essential nutrient for the human body, as it plays an important role in the functioning of the immune system and in the process of wound healing. It is a powerful antioxidant that helps to protect cells from damage caused by free radicals. Vitamin C also helps to stimulate the production of white blood cells, which are responsible for fighting infections. In the process of wound healing, vitamin C helps to form collagen, a protein that is essential for the formation of new tissue. Without enough vitamin C, the body may have difficulty in healing wounds and may be more susceptible to infections.