What is the watery liquid that circulates in the anterior chamber of the eye called?

The watery liquid that circulates in the anterior chamber of the eye is known as aqueous humor. This fluid plays a crucial role in maintaining intraocular pressure, providing nutrients to the avascular structures of the eye, such as the lens and cornea, and removing metabolic wastes.

Aqueous humor is specifically produced by the ciliary body, located behind the iris, and flows through the pupil into the anterior chamber of the eye. It is essential for maintaining the shape of the eye and its optical properties. Its presence helps ensure that the eye functions properly, facilitating light transmission and contributing to the overall health of the ocular environment.

The other choices refer to different fluids found in the body. Vitreous humor is a gel-like substance found in the posterior chamber of the eye, filling the space between the lens and the retina. Synovial fluid is present in joints, providing lubrication and reducing friction between the articular cartilages. Endolymph is a fluid found in the inner ear, involved in the function of hearing and balance. Hence, these do not pertain to the anterior chamber of the eye, making aqueous humor the correct answer.