Question

internal (inner) ear
the internal ear is a maze of bony chambers called the bony labyrinth, or osseous labyrinth (labt-rinth; maze), located deep within the temporal (1) behind the eye socket. the three subdivisions of the bony labyrinth are the spiraling, pea - sized cochlea (kokle - ah, snail), the vestibule (vesti - búl), and the semicircular canals. the vestibule is situated between the (2) canals and the cochlea. the views of the bony labyrinth typically seen in textbooks, including this one, are somewhat misleading because we are really talking about a cavity. figure 8.11 can be compared to a cast of the bony labyrinth - that is, a (3) that was filled with plaster of paris and then had the bony walls removed after the plaster hardened. the shape of the plaster then reveals the shape of the cavity that worms through the (4) bone.
the bony labyrinth is filled with a plasmalike fluid called perilymph (pert - limf). suspended in the perilymph is a membranous labyrinth, a system of membrane sacs that more or less follows the shape of the bony labyrinth. the membranous labyrinth itself contains a thicker (5) called endolymph (endo - limf).

1. temporal 2. fluid 3. bone 4. semicircular 5. labyrinth
2. semicircular 2. labyrinth 3. temporal 4. fluid 5. bone
3. fluid 2. bone 3. semicircular 4. labyrinth 5. temporal
4. labyrinth 2. temporal 3. fluid 4. bone 5. semicircular
5. bone 2. semicircular 3. labyrinth 4. temporal 5. fluid

Explanation:

1. The internal ear is located deep within the temporal bone.
2. The vestibule is between the semicircular canals and cochlea.
3. A cast is a cavity (here, bony labyrinth cavity) filled with plaster.
4. The cavity (bony labyrinth) is in the temporal bone.
5. The membranous labyrinth contains a thicker fluid (endolymph).

Answer:

1. temporal 2. semicircular 3. cavity 4. temporal 5. fluid (the correct option is the first one: 1. temporal 2. fluid 3. bone 4. semicircular 5. labyrinth, but with the correction of 3 being cavity as per context, however among the given options, the intended answer is likely the first option as it aligns with the anatomical terms placement in the text)