Sperm contain enzymes in the acrosome region of the head that allow them to penetrate these layers. At the moment of fertilization it facilitates the acrosomal reaction of the sperm cells. In this follicle, the oocyte is surrounded by the zona pellucida and a group of cells known as the corona radiata , which is derived from the cumulus oophorus. The follicle has a large fluid-filled antrum and is enveloped by follicular cells comprising the zona granulosa, as well as internal and external theca cells. Initially it is united with the cells of the corona radiata during the transport of the oocyte within the fallopian tube. Additionally, the urethral sponge contains the Skene's glands, which may be involved in female ejaculation.. TorF ... creation of the zona pellucida, second meiotic division completion, dramatic increase in progesterone levels, corpus luteum formation, antrum formation, first meiotic division. The egg is surrounded by a thick coat composed of a carbohydrate protein complex called zona pellucida. During the whole time span from ovulation up to implantation, the oocyte is enveloped by the pellucid zone, the role of which changes. 它位于两大腿内侧，是位于女阴两侧、阴阜下方的一对纵长的呈隆起状的皮肤皱襞，皮下含丰富的脂肪 组织、弹性纤维及静脉丛，在会阴处相连合。 大阴唇外侧面与附近皮肤相同，性成熟后表面多覆盖有阴毛，皮下富含汗腺及皮脂腺，有皮肤色素沉着，较周围皮肤颜色深。 Once released, the oocyte begins its second meiotic division, as far as metaphase II. La ZP tiene diferente grosor entre las especies, varía desde 5 μm en el ratón, a 15-20 μm en la mujer y 27 μm en la vaca. تپهٔ ونوس، بافتی تپه‌گونه، متشکل از چربی است که در ناحیه جلوی استخوان شرمگاهی یا زهار و بالای واژن زنان قرار دارد. False. Sexual stimulation. After encountering the oocyte, sperm next have to penetrate the outer corona radiata and zona pellucida layers of the oocyte. If a sperm passes through the corona radiata and zona pellucida and enters the cytoplasm of the secondary oocyte, the second meiotic division resumes to form a polar body and a mature ovum After ovulation and in response to luteinizing hormone, the portion of the follicle that remains in the ovary enlarges and is transformed into a corpus luteum . The zona is surrounded by an outer envelope, the corona radiata, which is many cell layers thick and formed by follicle cells adhering to the oocyte before it leaves the ovarian follicle. La Zona pelúcida (ZP) muestra un patrón de cordones de matriz extracelular entrecruzados en la superficie, debido al depósito desigual de proteínas de la ZP en los espacios entre las células de la corona radiada. این جز، بخشی از اندام تناسلی زنانه است. Division only carries on if the ovum is fertilised. Research indicates that the vestibular bulbs are more closely related to the clitoris than to the vestibule because of the similarity of the trabecular and erectile tissue within the clitoris and bulbs, and the absence of trabecular tissue in other genital organs, with the erectile tissue's trabecular nature allowing engorgement and expansion during sexual arousal. Structure. at full maturity, an oocyte is located in the corona radiata. انبانک تخمدان یا فولیکول تخمدان (به انگلیسی: Ovarian follicle) توده هایی کروی شکل در تخمدان زنان هستند که در طی یک دوره قاعدگی یک یا چند عدد از آن‌ها رشد نموده و تخمک یا اووم آزاد می‌شود. The envelope of a mammalian egg is more complex. The oocyte, zona pellucida and the follicular cells surrounding the ooctye (known as the corona radiata) are all expelled at ovulation, and enter the fallopian tube. The urethral sponge encompasses sensitive nerve endings, and can be stimulated through the front wall of the vagina.Some women experience intense pleasure from stimulation of the urethral sponge and others find the sensation irritating.
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