Body of penis

{{Short description|Part of the penis located outside of the pelvic cavity}}

{{Infobox anatomy

| Name = Body of the penis

| Latin = corpus penis

| Image = File:Penile diagram.jpg

| Caption = Diagram of penis. Body (labeled as shaft) at the top.

| Image2 = Gray1154.png

| Caption2 = The constituent cavernous cylinders of the penis.

| Precursor = Genital tubercle

| System =

| Part_of = Penis

| Artery =

| Vein =

| Nerve =

| Lymph =

}}

The body or shaft of the penis is the free portion of the human penis that is located outside of the pelvic cavity.{{Cite web |date=2021-06-14 |title=Penis anatomy: Functions and common conditions |url=https://www.medicalnewstoday.com/articles/penis-anatomy |access-date=2023-03-13 |website=www.medicalnewstoday.com |language=en}} It is the continuation of the internal root, which is embedded in the pelvis and extends to the glans.{{Cite web |title=The Penis - Structure - Muscles - Innervation - TeachMeAnatomy |url=https://teachmeanatomy.info/pelvis/the-male-reproductive-system/penis/ |access-date=2023-03-13 |website=teachmeanatomy.info}} It is made up of the two corpora cavernosa and the corpus spongiosum on the underside. The corpora cavernosa are intimately bound to one another with a dorsally fenestrated septum, which becomes a complete one before the penile crura. The body of the penis is homologous to the female clitoral body.{{cite book|last=Rodgers|first=Joann|title =Sex: A Natural History | publisher = Henry Holt and Company |year = 2003|page=92|access-date = September 29, 2023 |isbn= 978-0-80507-281-5 |url = https://books.google.com/books?id=eJutAwmKCPEC&dq=%E2%80%9Cclitoral+shaft%E2%80%9D+%E2%80%9Cpenile+shaft%E2%80%9D&pg=PA92}}{{cite book|last1=Gormley-Fleming|first1=Elizabeth|last2=Peate|first2=Ian|title = Fundamentals of Children and Young People's Anatomy and Physiology: A Textbook for Nursing and Healthcare Students | publisher = Wiley |year = 2021|page=307|access-date = September 29, 2023 |isbn= 978-1-11961-924-6 |url = https://books.google.com/books?id=7cYrEAAAQBAJ&dq=%E2%80%9Ccorpus%E2%80%9D+%E2%80%9Cclitoris%E2%80%9D+%E2%80%9Cshaft%E2%80%9D&pg=PA307}}{{cite book|last1=Greenberg|first1=Jerrold S.|last2=Bruess|first2=Clint E.|last3=Oswalt|first3=Sara B.|title = Exploring the Dimensions of Human Sexuality | publisher = Jones & Bartlett Learning|year = 2014|page=259|access-date = September 29, 2023 |isbn= 978-1-44964-851-0 |url= https://books.google.com/books?id=hm3aTuANFroC&dq=%E2%80%9Cgenital+tubercle%E2%80%9D+%E2%80%9Cclitoral+shaft%E2%80%9D+%E2%80%9Cpenile+shaft%E2%80%9D&pg=PA259}}

Structure

The body of the penis is suspended from the pubic symphysis.{{Cite web |title=The Penis - Structure - Muscles - Innervation - TeachMeAnatomy |url=https://teachmeanatomy.info/pelvis/the-male-reproductive-system/penis/ |access-date=2023-04-29 |website=teachmeanatomy.info}} It has two surfaces; the dorsal and the ventral or urethral. The penile raphe runs on its ventral surface.

The body is surrounded by a bi-layered model of tunica albuginea in which a distal ligament buttresses the glans penis and plays an integral role to the penile fibroskeleton, and the structure is called "os analog", a term coined by Geng Long Hsu in the Encyclopedia of Reproduction.{{cite book|doi=10.1016/B978-0-12-801238-3.64602-0|chapter=Penis Structure|title=Encyclopedia of Reproduction|pages=357–366|year=2018|last1=Hsu|first1=Geng-Long|last2=Liu|first2=Shih-Ping|isbn=9780128151457}} This indispensable structure is a continuation of the body of the human penis, differing from other mammalian penises, in that it has no baculum (or erectile bone) and instead relies exclusively on engorgement with blood to reach its erect state. It is a remnant of the baculum that evolved likely due to change in mating practice.{{cite web|url=https://www.science.org/content/article/why-humans-lost-their-penis-bone

|title=Why Humans Lost Their Penis Bone|publisher= Science}}

A shallow groove, which marks their junction on the upper surface lodges the deep dorsal vein of the penis, which is flanked by a pair of cavernosal veins of the penis, while a deeper and wider groove between them on the surface below contains the corpus spongiosum. The body is ensheathed by fascia, which includes tunica albuginea, Buck's fascia, dermis, and skin.

See also

Additional images

File:Slide12eee.JPG|Dissection of the male human genitalia

File:Slide11rrr.JPG|Dissection of the human thigh

References

{{Gray's}}

{{Male reproductive system}}

{{Portal bar|Anatomy}}

{{Authority control}}

Category:Mammal male reproductive system

Category:Human penis anatomy

Category:Human penis

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