Originally Answered: In biology, what is chiasmata? If you are asking for cell biology, âChiasmaâ is a point of overlap of paired chromatids at which fusion and exchange of genetic material take place during prophase of meiosis. It is the X-shaped structure formed at the point below the brain where the two optic nerves cross over each other.
However, a diet rich in fruit and vegetables that is typical of a vegan diet has a positive effect on the calcium economy and markers of bone metabolism in men and women (49). The high potassium and magnesium content of fruit and vegetables provides an alkaline ash, which inhibits bone resorption (53).
Healthy bones require calcium and vitamin D. Our hearts may do better when we eat fish rich in omega-3 fatty acids. And for healthy skin we should eat, well, hmmm, thatâs a good question. If youâre not sure which foods are good for your skin and which ones are harmful, youâre certainly not alone. Little research has shown a connection between particular foods and skin health, says Cheryl Karcher, MD, a New York dermatologist who worked as a nutritionist before she became a doctor.