The correct answer is C. Cornea.
The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber. It helps to focus light onto the retina at the back of the eye. The cornea is not part of the digestive system.
The digestive system is a series of organs that work together to break down food into nutrients that the body can use. The organs of the digestive system include the mouth, esophagus, stomach, small intestine, large intestine, rectum, and anus.
The mouth is where food is chewed and mixed with saliva. The esophagus is a muscular tube that carries food from the mouth to the stomach. The stomach is a muscular sac that churns and mixes food with digestive juices. The small intestine is a long, coiled tube that absorbs nutrients from food. The large intestine is a shorter, wider tube that absorbs water from food and stores waste products. The rectum is a short, muscular tube that stores waste products before they are eliminated from the body through the anus.
The digestive system is a complex system that plays an essential role in our health. It is important to eat a healthy diet and to get regular exercise to keep the digestive system functioning properly.