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The human brain. Differences in male and female brain size are relative to body size. [82] Early research into the differences between male and female brains showed that male brains are, on average, larger than female brains. This research was frequently cited to support the assertion that women are less intelligent than men.
The same human pelvis, front imaged by X-ray (top), magnetic resonance imaging (middle), and 3-dimensional computed tomography (bottom). The pelvis (pl.: pelves or pelvises) is the lower part of the trunk, [1] between the abdomen and the thighs (sometimes also called pelvic region), together with its embedded skeleton [2] (sometimes also called bony pelvis or pelvic skeleton).
The male external genitalia include the penis and the scrotum. The female external genitalia include the clitoris, the labia, and the vestibule, which are collectively called the vulva. External genitalia vary widely in external appearance among different people. One difference between the glans penis and the glans clitoridis is that the glans ...
The pelvic floor or pelvic diaphragm is an anatomical location in the human body, [ 1] which has an important role in urinary and anal continence, sexual function and support of the pelvic organs. [ 2] The pelvic floor includes muscles, both skeletal and smooth, ligaments and fascia. [ 3] and separates between the pelvic cavity from above, and ...
Perineum. The perineum ( pl.: perineums or perinea) in placental mammals is the space between the anus and the genitals. The human perineum is between the anus and scrotum in the male or between the anus and vulva in the female. [ 2] The perineum is the region of the body between the pubic symphysis (pubic arch) and the coccyx (tail bone ...
The excitement phase (also known as the arousal phase or initial excitement phase) is the first stage of the human sexual response cycle, which occurs as a result of physical or mental erotic stimuli, such as kissing, making out, fantasizing or viewing erotic images, that leads to sexual arousal. During this stage, the body prepares for sexual ...
Sexual differentiation is the process of development of the sex differences between males and females from an undifferentiated zygote. [1] [2] Sex determination is often distinct from sex differentiation; sex determination is the designation for the development stage towards either male or female, while sex differentiation is the pathway towards the development of the phenotype.
Pelvic muscle spasms or weakness. Pelvic organ prolapse. Postmenopause. Smoking. Spicy foods. Urinary tract infection (UTI) Bladder muscles and nerves can be damaged or affected by conditions such as: