Question

Weberian oscilces, a chain of bony pieces present in a number of teleosts, connect the internal ear with

• A. Swim bladder
• B. Intestine
• C. Kidney
• D. Pancreas

Hint:

Weberian Apparatus: Connects the SWIM BLADDER to the INTERNAL EAR in Ostariophysi (Carps/Catfishes). Composed of Tripus, Intercalarium, Scaphium, Claustrum.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Acoustico-lateralis system in superorder Ostariophysi: the Weberian apparatus acoustically couples the gas-filled swim bladder (acting as a resonance transducer) with the fluid-filled pars inferior of the inner ear.
Key Formula or Approach:
\[ \text{Swim Bladder (Acoustic Resonator)} \xrightarrow{\text{Weberian Ossicles: Tripus } \rightarrow \text{ Intercalarium } \rightarrow \text{ Scaphium } \rightarrow \text{ Claustrum}} \text{Inner Ear (Sinus Impar / Sacculus)} \]

Step 2: Detailed Explanation:
In fish anatomy and sensory acoustics:
- The Weberian Apparatus (Weberian Ossicles) is an anatomical auditory specialization characteristic of the superorder Ostariophysi (carps, minnows, catfishes, and characins).
- It consists of four paired modified anterior vertebral elements: the Tripus, Intercalarium, Scaphium, and Claustrum.
- These bony ossicles physically span the gap and transmit sound-induced pressure oscillations from the Swim Bladder (which functions as an acoustic chamber resonator) directly to the perilymph of the internal ear (sinus impar sacculus), conferring superior auditory sensitivity and extended frequency reception.

Step 3: Final Answer:
Therefore, Weberian ossicles connect the internal ear with the Swim bladder, corresponding to option (A).