Sexual anatomy

The prostate is an accessory gland of the male reproductive system and a muscle-driven mechanical switch between urination and ejaculation. It is found in all male mammals. It differs between species anatomically, chemically, and physiologically. Anatomically, the prostate is found below the bladder, with the urethra passing through it. It is described in gross anatomy as consisting of lobes and in microanatomy by zone. It is surrounded by an elastic, fibromuscular capsule and contains glandular and connective tissue.

rounded mass of fatty tissue found over the pubic symphysis

measurement of the human penis

connective tissue-muscular floor of the pelvic cavity

characteristic that distinguishes the sexes, primary and secondary

nerve which originates in the sacral spinal cord

broad, thin muscle, situated on either side of the pelvis

tissue that becomes erect when filled with blood

thumb|Spermatheca of Acanthoscurria geniculata (Brazilian Giant White Knee Tarantula) thumb|Variety of the structure of spermathecae in Phlebotominae (Diptera, Psychodidae) thumb|Female tarantula molt

In humans, the crotch is the bottom of the pelvis (the region of the body where the legs join the torso) and is the part of the body that includes the groin and genitals.

sexual rehearsal play

place on the human body which it is usually customary to keep covered with clothing in public areas

anatomical feature

exocrine gland in the penis or clitoris

dimensions and shape of the human vagina

In developmental biology and zoology, defeminization is an aspect of the process of sexual differentiation by which a potential female-specific structure, function, or behavior is changed by one of the processes of male development.

secondary sex characteristic on some mature male frogs and salamanders

The glans (, : glandes ; from the Latin word for "acorn") is a vascular structure located at the tip of the penis in male mammals or a homologous genital structure of the clitoris in female mammals.

results of sexual differentiation that are intermediate between male and female poles

Hyperthecosis, or ovarian hyperthecosis, is hyperplasia of the theca interna of the ovary. Hyperthecosis occurs when an area of luteinization occurs along with stromal hyperplasia. The luteinized cells produce androgens, which may lead to hirsutism and virilization (or masculinization) in affected women.

part of the penis

species of mollusc

thumb|Muggeseggele refers to the sex organ of a housefly. Muggeseggele, or Muckenseckel, is a humorous Alemannic German idiom used in Swabia to designate a nonspecific very small length or amount of something; it refers to a housefly's scrotum. It has been called the smallest Swabian unit of measurement and plays a similar role in northern Baden-Württemberg and Franconia.