JAMB - Biology (1987 - No. 34)

The sequence of ear ossicles from the fenestra ovalis is
malleus, incus and stapes
malleus, stapes and incus
stapes, incus and malleus
stapes, malleuls and incus

Explanation

The sequence of ear ossicles, starting from the fenestra ovalis (oval window) and moving towards the eardrum, is: stapes, incus, and then malleus. 

Stapes (Stirrup): This is the innermost ossicle, and its footplate sits directly on the oval window.

Incus (Anvil): The incus articulates with the stapes, forming a chain of bones.

Malleus (Hammer): The malleus is the outermost ossicle, and its head articulates with the incus, while its handle is attached to the tympanic membrane (eardrum).

Comments (0)

Advertisement