▣The cranial cavity contains the brain脑 and associated Ears Cranial cavity membrane(meninges) ▣Two ears耳：external ears are visible,but internal ears are Orbits embedded in a bone. Nasal cavities and ▣Two orbits眶contain paranasal sinuses Choanae the eyes.The apex of cone-shaped chambers Nares. Oropharyngeal Oral fissure isthmus are directed posterio- medially. Oral cavity3  The cranial cavity contains the brain 脑 and associated membrane (meninges)  Two ears 耳：external ears are visible, but internal ears are embedded in a bone.  Two orbits 眶 contain the eyes. The apex of cone-shaped chambers are directed posterio￾medially