It's so hard when erect, does a man's penis have bones?

Many people believe that the reason why a man's penis becomes extremely hard after erection is because there is a substance similar to "bone" in it. However, when a man's penis is not erect, it becomes very soft. Does this contradict the previous saying? Today, the editor invited a male expert to analyze the structural composition of the man's penis.

shape

The penises of different animals have different shapes, especially the glans. The penis of a horse is relatively large, slightly flattened on both sides, and is cylindrical; the penis of a cow or sheep is relatively thin, forming an "S" shape behind the scrotum; the penis of a pig is also thin, forming an "S" shape in front of the scrotum.

Many marsupials, except the two largest species of kangaroos, have a bifurcated penis (a penis that splits into two cylinders at the end).

The penis can be divided into three parts: the front bulge of the penis, the middle penis body, and the back penis root.

Head of penis

The glans penis is the bulging part at the front end of the penis, commonly known as the "glans glasnost", and its appearance varies depending on the species of animal.

The glans of cattle is pointed and slightly twisted. The glans of horses is blunt and round, with a glans corona on the periphery and a urethral process (2.5 cm) in the glans fossa. The glans of pigs is spiral-shaped with a shallow spiral groove. The glans of sheep is a cap-shaped protuberance with a urethral process extending into the front of the glans (curved and thin in sheep, thick and straight in goats). The glans of dogs has a penis bone (large dogs can reach 10 cm) and two glans bulbs at the back of the penis. The glans of tigers and cats have keratinized papillae.

Penis

The middle part of the penis is the penis body, which is cylindrical and suspended by ligaments in the front and lower part of the pubic symphysis. It is the movable part.

The penis of an elephant is cylindrical, thin and long, about 90 cm, located below the abdominal wall, starting from the ischial arch, extending forward between the left and right thighs to the umbilicus. The penis of a tiger is long cylindrical, about 18 cm long, 1.5-2.5 cm in diameter, gray-brown, and opaque. The glans is conical, with a rounded top, and small nipples or sand-like barbs in the middle and lower parts, which feel rough to the touch. The glans has foreskin or the foreskin is turned up, and there is a short penis bone inside, and the urethra is Y-shaped.

The penis of cattle is oblate and cylindrical, with a thick base and a gradually tapering tip. It is 30-70 cm long and 1.5-2 cm in diameter. It is brown or light brown and translucent. The glans is oblong and conical, with barbs made by scissors or by wrapping the thin skin with hook-like protrusions on the surface of the tongue. It feels prickly when touched. The glans may or may not have a reversed foreskin, no testicles, and no penis bones. The top of the glans is cut into a trident shape.

The corpus penis is composed of the corpus cavernosum and the corpus urethrae, and has abundant blood vessels, nerves, and lymphatic vessels.

Erectile tissue and erection: Erectile tissue is mainly a pair of penile corpora cavernosa, which are covered with thick fibrous tissue on the dorsal side of the urethral corpora cavernosa. The corpora cavernosa is composed of many small channels of fibrous tissue, and the trabeculae divide it into many gaps, which are actually venous sinuses formed by the expansion of capillaries. When the erection is aroused, a large amount of blood is injected into the vascular part of the corpora cavernosa, and the volume increases. Retraction is because the sciatic corpora cavernosa muscles release the pressure on the dorsal vein of the penis, allowing blood to flow back.

Penis root

The posterior end of the penis is the root of the penis, which is hidden deep in the skin of the scrotum and perineum and fixed to the inferior pubic branch and sciatic branch, and is the fixed part.

The root of the penis is the starting point of the penis.

Crus penis - starts from the base of the penis and splits into two crus penis, which are fixed on both sides of the pubic arch.