The eustachian tube connects ____________ with the ___________ .

Options

A. External auditory canal, middle ear cavity
B. Middle ear cavity, pharynx
C. External auditory canal, labyrinth
D. Cochlea, larynx

Answer

To answer the question "The Eustachian tube connects ____________ with the ___________," we need to identify the two structures that the Eustachian tube connects.

### Step-by-Step Solution:

1. **Understanding the Eustachian Tube**: The Eustachian tube is a canal that plays a crucial role in connecting two important parts of the ear and throat.

2. **Identifying the First Structure**: The Eustachian tube connects to the middle ear cavity. The middle ear is the space behind the eardrum (tympanic membrane) and is responsible for transmitting sound vibrations.

3. **Identifying the Second Structure**: The Eustachian tube also connects to the pharynx. Specifically, it opens into the nasopharynx, which is the upper part of the pharynx located behind the nose.

4. **Formulating the Answer**: Therefore, the Eustachian tube connects the middle ear cavity with the pharynx.

### Final Answer:
The Eustachian tube connects **the middle ear cavity** with **the pharynx**.

---