Zebrafish their larval stages. In 2011, the British Heart Foundation ran an advertising campaign publicising its intention to study the applicability of this ability to humans, stating that it aimed to raise £50 million in research funding. Zebrafish have also been found to regenerate photoreceptor cells and retinal neurons following injury, which has been shown to be mediated by the dedifferentiation and proliferation of Müller glia. Researchers frequently amputate the dorsal and ventral tail fins and analyze their regrowth to test for mutations. It has been found that histone demethylation occurs at the site of the amputation, switching the zebrafish's cells
Crisscross heart the left ventricle. After the left ventricle is filled with blood the aortic valve opens allowing blood to go through, which the blood then enters the aorta and goes to the rest of the body. Crisscross heart is a very rare congenital heart defect, and results in many different symptoms, even though the heart still has the ability to perform its major function of pumping blood throughout the body. Individuals who have this disease will experience cyanosis which is a blue tint to the skin because of inadequate blood flow to the body, this symptom will be seen especially around