The retina is a term to refer to the layer of tissue that is behind the eyeball, it is sensitive to light, so it is known as a photoreceptor due to the specialized cells located on it that are known as cones and rods as wells as neurons. Through these, the images that pass through the lens of the eye are focused and become nervous signals; these nerve signals travel through the nervous system and reach the brain's neurons where they are processed. This tissue is mainly red, because of the blood vessels around it. So, the correct answer is B. Retina.
the circulatory distributes these nutrients. this maintains a cycle of balance or homeostasis and keeps glucose levels relatively steady unless you have diabetes
