Question

Identify two small apertures present in auditory capsule
a. Foramen magnum and foramen ovale
b. Foramen ovale and fossa ovalis
c. Fenestra ovalis and obturator foramen
d. Fenestra ovalis and fenestra rotunda.

Answer 1

Auditory capsule is a bony capsule that protects the middle and internal part of the ear vertebrates.

Complete step by step answer:
Complete Answer:Aperture is a small hole where a light can pass through.
Fenestra ovalis and fovea rotunda are called oval windows and round windows respectively. Middle ear is connected to the outer part of the inner ear through the oval window(a small hole from where light passes). Under the oval window, a round window is present. In the auditory capsule which is also known as bony capsule, two small holes are present -Oval and round window.They both enclose the parts of middle ear and inner ear.
1.The foramen magnum is a huge oval opening (foramen) in the occipital bone of the skull in people and numerous different creatures. It is one of the few oval or round openings (foramina) in the base of the skull. The foramen ovale is an opening in the divider between the left and right atria of each human baby. This opening permits blood to sidestep the fetal lungs, which can't work until they are presented to air.
Hence A is not the correct answer.
2.The foramen ovale is an opening in the divider between the left and right atria of each human baby. This opening permits blood to sidestep the fetal lungs, which can't work until they are presented to air.The fossa ovalis is the remainder of a meager sinewy sheet that secured the foramen ovale during fetal turn of events.
Hence B is not the correct answer
3.The Fenestra ovalis is a connective tissue film situated toward the finish of the center ear and the start of the inward ear.The obturator foramen is the enormous opening made by the ischium and pubis bones of the pelvis through which nerves and veins pass.

Hence the correct answer is option (D).

Note: Auditory capsule is basically a part of the skull in vertebrates that protects the inner ear.