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Learn about the external and internal parts of the male body, including the shaft of the penis. The shaft is the tube-like part of the penis that extends from the tip to the lower belly and contains the urethra.
The main parts are the root, body, the epithelium of the penis including the shaft skin, and the foreskin covering the glans. 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.
- Overview
- What is the penis?
- Functions
- Anatomy of the penis
- Types of penises
- List of conditions
- Healthy penis tips
- Summary
The main functions of the penis include reproduction and urination. Penises vary in length, girth, and appearance but mostly all have the same anatomy, which allows them to perform their functions.
Knowing the anatomy and function of the penis is important for good health. Noticing any changes in the appearance, sensation, or performance of the penis can indicate an underlying issue that may require medical attention.
The penis is the male copulatory organ. The term penis typically refers to the root, body, and glans of the genitals. The rest of the male sexual anatomy includes other external parts such as the scrotum, and internal parts such as the testicles.
The penis contains soft, spongy tissue as well as muscles, fibrous tissue, veins, arteries, and the urethra. These allow the penis to perform its functions.
The two main functions of the penis include sexual intercourse and micturition (urination).
When a person experiences arousal, the penis fills with blood, causing an erection. As such, erectile function is closely related to cardiovascular health.
The rigidity of the erection enables a person to penetrate a partner and have sex. Following sexual activity or manual stimulation, a person can then ejaculate. After ejaculation or loss of arousal, the penis can return to a flaccid state.
The penis also plays an important urinary role. The penis contains the urethra, which allows passage of urine from the bladder to the urethral opening, enabling a person to expel urine from the body.
The penis has three parts:
•Root: This is the part of the penis attached to the body and is not visible externally. It contains three erectile tissues, which include two crura and the bulb of the penis, and two muscles called the ischiocavernosus and bulbospongiosus. The urethra connects to the bladder and passes through all parts of the penis.
•Body: The body, or shaft, is the free part of the penis between the root and glans. It contains three cylinders of erectile tissue, which include two corpora cavernosa and the corpus spongiosum.
•Glans: This is the most distal, or end, part of the penis. It gets its shape from the bulbous expansion of the corpus spongiosum. The glans also features the urethral opening, which is where the urethra ends, allowing a person to expel urine and semen.
Just like any other body part, the penis can vary greatly from person to person. For penises, people typically notice differences in measurements and appearance.
Penises come in different lengths and girths, and this changes when flaccid or erect. Some people may measure the base-to-head ratio. There is no single size that is better than others, and people will have their own personal preference. There are more important factors for sexual compatibility than just penis size.
When erect, some penises may be straight, while others may have a bend. Penile curvature is common, rarely painful, and does not usually make penetrative sex more difficult. In fact, in some cases, penile curvature may be more pleasurable for the receiving partner.
Some people may or may not have a foreskin on their penis. Some individuals may have the foreskin surgically removed in a procedure called circumcision.
There are many conditions that can affect the penis. These may include:
•Penis infections: Many infections can affect the penis and cause painful symptoms such as redness, swelling, and itching. These can include balanitis, posthitis, balanoposthitis, and phthiriasis.
•Sexually transmitted infections (STIs): These refer to infections that people typically acquire through sexual contact. These can include chlamydia, gonorrhea, genital warts, and syphilis.
•Erectile dysfunction: This typically refers to when a person has difficulty getting or keeping a firm enough erection to have sex.
•Priapism: This is when blood becomes trapped in the penis and can cause a prolonged and painful erection that can result in permanent tissue damage.
•Chordee: This is a condition where bands of tissue pull on the penis, giving it a bent appearance.
It is advisable for a person to regularly wash their penis using a mild soap. People should avoid abrasive or heavily scented products as they can irritate the penis. People can also use this time to check their penis for anything that appears unusual or different. This can include checking the testicles for any lumps.
People should also consider using barrier methods, such as condoms, when having sexual intercourse, and undergo regular sexual health screenings, even if they are in a monogamous relationship.
Other tips can include general advice to improve overall health. This may involve eating a healthy diet, getting regular exercise, limiting alcohol consumption, and trying to avoid smoking.
Click here to learn more about penis health.
The penis refers to the male sex organ, which makes up part of male sex anatomy. In particular, the penis comprises the root, body, and glans. These sections contain erectile tissue, muscles, connective tissue, ligaments, and skin. These allow the penis to become erect, ejaculate, and urinate.
Shaft is a long slender part, such as the diaphysis of a long bone. It can also refer to the section of a hair, the main axis of a feather, or the cylindrical part of penis. See synonyms, anatomy, and patient discussion.
Aug 9, 2024 · Body – the free part of the penis, located between the root and glans. It is suspended from the pubic symphysis. It is composed of three cylinders of erectile tissue – two corpora cavernosa, and the corpus spongiosum. Glans – the most distal part of the of penis. It is conical in shape, and is formed by the distal expansion of the corpus ...
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Nov 13, 2020 · The shaft of the femur descends in a slight medial direction. This brings the knees closer to the body’s centre of gravity, increasing stability. A cross section of the shaft in the middle is circular but flattened posteriorly at the proximal and distal aspects.
Learn the various meanings and uses of the word shaft, from a long handle of a weapon to a cylindrical part of a hair. See synonyms, examples, etymology, and related phrases of shaft.
