This is known as the stroma.
The fluid-filled area in the chloroplast is called the stroma. It is located inside the inner membrane of the chloroplast and surrounds the thylakoid membranes. The stroma contains enzymes and other molecules necessary for the synthesis of carbohydrates during photosynthesis.
cyst
Ear!!
It's a vacuole.
Semicircular canals: are the fluid filled structures in the ear, which are involved in balance.
chlorplast
A simple fluid filled sac that is dark on ultrasound. It does not have any debris inside, only filled with fluid, which makes it benign.
Cytoplasm
A fluid-filled raised area on the skin of a finger (or anywhere else on the body) could be a blister. A blister can be caused by a burn or by repeated rubbing, such as blisters on the feet caused by shoes that do not fit correctly.
A closed sac with fluid in it
A blastocoele is the fluid-filled cavity in the blastula.
The ventricles are the fluid-filled cavities of the brain.
cytoplasm
cyst
cloroplast
the morula develops into a hollow, fluid-filled ball of cells called a blastocyst.
A cyst is a fluid filled sac. Bilateral means both, therefore the meaning is: Fluid filled sacs in both breasts.
Some Synovial joints may have fluid-filled sacs called bursae.