Question

Malleus, incus and stapes, the three ear ossicles are derived respectively from which of the following jaw bones?
A.Articular, quadrate and hyomandibular
B.Hyomandibular, quadrate and articular
C. Quadrate, articular and hyomandibula
D.Humerus, articular and squamosal

Answer 1

Hint: The ossicular chain contains the malleus, incus, and stapes. Together, these bones capacity to transduce acoustic vibrations from the tympanic layer to the inward ear. The three hear-able icicles — the malleus, incus, and stapes — are little bones found in the center ear.

Complete answer:
The mallet like malleus is the most parallel of the ossicles and has an enormous, adjusted head on its boss end, which tightens to a restricted neck and handle on its mediocre end. It is associated with the tympanic layer, or eardrum, at the handle and structures a synovial joint with the incus at the head. The iron block like incus is the center ossicular that structures synovial joints with the malleus on its long side and the stapes on its average side.

The incus is ample where it meets the malleus and tightens to a slender projection known as the lenticular cycle where it meets the stapes. The stirrup-molded stapes is the littlest ossicles with an empty space in the center.
The stapes starts with a small round and hollow head where it meets the incus before parting into two equal segments of bone known as the foremost and back crus. These segments end abruptly at the level, elliptical base that rests inside the oval window and behaviors sound into the inward ear.

Hence the correct answer is OPTION(A)

Note: These are the malleus, or mallet, the incus, or iron block, and the stapes, or stirrup. Together they structure a short chain that crosses the center ear and communicates vibrations brought about by sound waves from the eardrum film to the fluid of the inward ear.