genital tubercle การใช้

• In the developing fetus, the genital tubercle develops into the homologous.
• If exposed to testosterone, the genital tubercle elongates to form the penis.
• Prior to that, the genital tubercle in both sexes is a phallus.
• Beginning in the third month of development, the genital tubercle becomes the clitoris.
• The term genital tubercle, however, still remains, but only refers to the future glans
• Before this stage, humans are simply undifferentiated and possess a M黮lerian duct, a Wolffian duct, and a genital tubercle.
• During belly aspect of the genital tubercle ) form the labia minora, and the labioscrotal swellings enlarge to form the labia majora.
• On the other hand, sex-dependent development include further protrusion of the genital tubercle in the male to form the penis.
• This includes the development of a genital tubercle and a membrane dorsally to it, covering the developing urogenital opening, and the development of labioscrotal folds.
• On the other hand, sex-dependent development include further protrusion of the genital tubercle in the male to form the glans of the penis and in the female, the clitoral glans.
• The genital tubercle is sensitive to dihydrotestosterone and rich in 5-alpha-reductase, so that the amount of fetal testosterone present after the second month is a major determinant of phallus size at birth.
• The embroyo develops three distinct external genital structures : a genital tubercle; two urogenital folds, one on either side of the tubercle; and two labioscrotal swellings, each bounding one of the urogenital folds.
• It is thought diphallia occurs in the fetus between the 23rd and 25th days of gestation when an injury, chemical stress, or malfunctioning homeobox genes hamper proper function of the caudal cell mass of the fetal mesoderm as the urogenital sinus separates from the genital tubercle and rectum to form the penis.