Final answer:
Aqueous humor leaves the posterior chamber primarily a. via the trabecular meshwork and the Canal of Schlemm in the anterior chamber, with a minor portion leaving through the uveoscleral pathway.
Step-by-step explanation:
The aqueous humor in the eye leaves the posterior chamber primarily through a. the trabecular meshwork and the Canal of Schlemm, which are located in the anterior chamber. This is the major pathway for the drainage of aqueous humor.
Additionally, a minor portion of aqueous humor can leave the eye through the uveoscleral pathway. Tear ducts are not involved in the drainage of aqueous humor. The vitreous humor, on the other hand, is located in the posterior cavity and does not leave the eye through the anterior chamber.