You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is JG cells (juxta glomerular apparatus) are and explain in detail?
INDERBIR SINGH&;S TEXTBOOK OF HUMAN HISTOLOGY-PAGE NO:313Juxtaglomerular cells the muscle cells in the wall of the afferent aerioles are modified.they are large and rounded(epithelium)and have spherical nuclei. their cytoplasm contains granules that can be stained with special methods. these are called juxtaglomerular cells