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關於Penis Anatomy

醫學教育和生物教育

The human penis is an external male intromittent organ that additionally serves as the urinary duct. The main parts are the root (radix); the body (corpus); and the epithelium of the penis including the shaft skin and the foreskin (prepuce) covering the glans penis. The body of the penis is made up of three columns of tissue: two corpora cavernosa on the dorsal side and corpus spongiosum between them on the ventral side. The human male urethra passes through the prostate gland, where it is joined by the ejaculatory duct, and then through the penis. The urethra traverses the corpus spongiosum, and its opening, the meatus (/miːˈeɪtəs/), lies on the tip of the glans penis. It is a passage both for urination and ejaculation of semen (see male reproductive system.)

Most of the penis develops from the same embryonic tissue as the clitoris in females. The skin around the penis and the urethra share the same embryonic origin as the labia minora in females. An erection is the stiffening expansion and orthogonal reorientation of the penis, which occurs during sexual arousal. Erections can occur in non-sexual situations; spontaneous non-sexual erections frequently occur during adolescence and sleep. In its flaccid state the penis is smaller, gives to pressure, and the glans is covered by the foreskin. In its fully erect state the corpus becomes rigid and the glans becomes engorged but not rigid. An erect penis may be straight or curved and may point at an upward angle, a downward angle, or straight ahead. As of 2015 the average erect human penis is 13.12 cm (5.17 inches) long and has a circumference of 11.66 cm (4.59 inches). Neither age nor size of the flaccid penis accurately predicts erectile length.

The most common form of alterations of the penis are circumcision and piercings. Circumcision is the removal of part or all of the foreskin for various cultural, religious, and, more rarely, medical reasons, and there is controversy surrounding the practice. Efforts by scientists to partially or fully regenerate the structures of the human penis are currently underway. Patients who can benefit most from this field are those who have congenital defects, cancer, injuries that have excised parts or all of their penis, and men wishing to reverse forms of involuntary genital modification.

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最新版本1.8更新日誌

Last updated on 2022年12月12日

Minor bug fixes and improvements. Install or update to the newest version to check it out!

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最新版本

請求 Penis Anatomy 更新 1.8

上傳者

Andrew Rodriguez Sacaca

系統要求

Android 5.0+

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