hymen
The hymen is a thin membrane that partially covers the vaginal opening. The shape varies but a typical hymen is crescent or half-moon shaped and is below (or to the rear) of the vaginal opening. See the picture and article in the related link below.
The hymen can be found surrounding the vaginal opening in female humans. The hymen is not always present in all females, some are born without one or trans women may not have one.
no it is not in the center f the cell sometimes it can be found near the membrane
Surprisingly, membrane proteins are found in or attached to the membrane.
Every cell membrane consists of phospholipid bi layer, specialized proteins, cholesterol and glycolipids.Every plasma membrane maintains a membrane resting potential across its surface. Sometimes clusters of cholesterol called lipid rafts are also found.
In your mums vaginal region
Yes sometimes it can if the cysts are particularly large i have found that intercourse can actually cause the cyst to burst due to the pressure created on the vaginal wall
No, it is not skin, but a membrane that is found lining all parts of the body that are internal but with an outside exit. These include your entire digestive tract, upper respiratory tract, and urinary/reproductive tracts. This membrane produces mucous and you make plenty of it when you have a upper respiratory infection like a cold.
Vaginal fluid
Another lipid found in the cell membrane is cholesterol.
Cholesterol can be found in the cell membrane, specifically in the lipid bilayer, where it helps maintain the membrane's structure and fluidity.
Assuming by nuclear membrane, you mean the membrane that surrounds the nucleus of cells, then nuclear membrane are found keeping the tidbits of cell nuclei together in the middle of the cytoplasm of the cell.