Thepenisis the male sexual organ of vertebrates, accountable for depositing sperm within the lady’s vagina.
It has a twin operate, as it’s by way of the penis that sperm and urine are eradicated by way of the urethra. Subsequently, it’s an organ that belongs to the reproductive and excretory system.
Anatomy and histology of the penis
The penis has a cylindrical form, with a variable dimension between 10 and 18 cm when erect, and could be divided into three components:
- Base or Root: Portion inserted contained in the physique.
- Physique: Largest portion of the penis, equivalent to the extension of the organ.
- Glans: The dilated portion, referred to as the pinnacle of the penis, is essentially the most delicate half. It’s lined by a layer of retractable pores and skin, the foreskin. The foreskin could be eliminated by way of a surgical procedure known as circumcision.
Penis anatomy
On the tip of the glans is the tip of the urethra, a slit by way of which urine and sperm are launched. Sebaceous glands are discovered within the glans area.
The tissue that kinds the penis has the flexibility to fill and empty with blood, permitting the erectile operate of the organ. To do that, there are three cylindrical buildings:
- Corpora cavernosa: Two superior cylinders situated within the dorsal place, they lie facet by facet alongside the organ. They’re surrounded by denseconnective tissue.
- Corpus spongiosum: A cylinder within the ventral place that surrounds the urethra. Its ends kind the glans. It’s lined by muscle tissue.
Inside construction of the penis
See additionally:Male Reproductive System
What causes penile erection?
For the penis to turn out to be erect, it must fill withblood. This response happens in response to some kind of erotic stimulus.
The tissues of the corpora cavernosa are just like sponges and might fill with blood. When this occurs, the spongy erectile tissue absorbs the blood, like an inflatable system, and the penis will increase in dimension and quantity.
Penis erection mechanism
Penis erection is feasible as a result of motion of nerves. Chemical reactions triggered within the physique trigger theblood vessels to chill out. This permits the vessels and muscular tissues of the corpora cavernosa to fill with blood.
When ejaculation happens, blood move decreases and the penis turns into flaccid once more. All of those actions that happen throughout an erection are coordinated by the autonomic nervous system.
Penile erection is a vital course of, as it’s what makes it attainable for the organ to penetrate the girl’svaginathroughout sexual activity.
See additionally: Sperm
Illnesses that have an effect on the penis
Some varieties of ailments can have an effect on the penis, discover out the primary ones:
Phimosis
Phimosis happens when it’s not attainable to tug again the foreskin, the pores and skin that covers the glans. The area turns into lined by the foreskin , inflicting discomfort and ache throughout erection and sexual activity.
Moreover, it prevents the glans from being correctly cleaned, inflicting the buildup of disagreeable substances. It’s price noting {that a} lack of correct hygiene can lead to the event of penile most cancers.
Penile most cancers
Penile most cancers is taken into account uncommon. Phimosis is a vital issue that may set off the emergence of one of these most cancers, related to poor hygiene and low socioeconomic circumstances.
One of many first indicators of the illness are modifications within the pores and skin of the penis, particularly on the glans and foreskin. It is not uncommon for wounds to look, modifications in pores and skin colour, lesions, secretion launch, swelling of the glans, and the presence of nodules and lumps.
Fungal an infection
The fungusCandida albicansmay cause infections of the penis, particularly within the glans and foreskin area. The identical fungus is accountable for candidiasis in ladies.
Transmission can happen throughout sexual activity with out using condoms. Nevertheless, it will possibly additionally happen with out sexual contact.
The illness is characterised by inflicting redness and itching of the glans.
Discover out extra, learn additionally:
- Prostate
- Sexually Transmitted Diseases
- Urinary System
- Excretory System