0 a Latin word meaning "membrane" (= a very thin layer of tissue that covers or connects parts of the body), used in medical names and descriptions
In vitro and in vivo studies reveal that hamster oocyte meiotic arrest is maintained only transiently by follicular fluid, but persistently by membrana/cumulus granulosa cell contact.
An apparent source of such a factor within the follicle is the major follicular component missing from the in vitro system, namely the membrana granulosa cells.
Often called a third eyelid or haw, it may be referred to in scientific terminology as the "plica semilunaris", "membrana nictitans" or "palpebra tertia".
In the antral follicle, it may be regarded as an extension of the membrana granulosa.
Included in the follicles are the cumulus oophorus, membrana granulosa (and the granulosa cells inside it), corona radiata, zona pellucida, and primary oocyte.
The eggs retain casts of the "membrana testacea", the internal membrane that adheres to the shell, familiar to anyone who has peeled a hard-boiled egg.
Apart from the transmission of the medulla oblongata and its membranes, the foramen magnum transmits the vertebral arteries, the anterior and posterior spinal arteries, the membrana tectoria and alar ligaments.
At one part of the mature follicle the cells of the membrana granulosa are collected into a mass which projects into the cavity of the follicle.
