A resonator.
A hollow chamber filled with air that amplifies sound when its air vibrates is called a resonating chamber or a sound chamber. It is designed to enhance and project sound waves produced within it, creating a louder and more resonant sound.
the morula develops into a hollow, fluid-filled ball of cells called a blastocyst.
Question?
Most are not. Some may have hollow parts, but most are filled with lead.
cochlear duct
epiphysis
solid.
Yes, and filled with air.
Assuming your talking about the eye...it would be the aqueous humor. The aqueous humor is produced by the ciliary processes in the ciliary body. It flows from the ciliary body into the anterior chamber. It travels out through the trabecular meshwork and into the Canal of Schlemm. It is then delivered to the bloodstream via anterior ciliary veins.
The eye has two main chambers: the anterior chamber, located behind the cornea and in front of the iris, and the posterior chamber, located behind the iris and in front of the lens. These chambers are filled with fluid that helps maintain the shape of the eye and nourish its internal structures.
bone marrow