Bulb of penis

{{Short description|Flare of the urethra tissue at the base of the human biological male sex organ}}

{{Infobox anatomy

| Name = Bulb of penis

| Latin = bulbus penis

| Image = Gray1154.png

| Caption = The constituent cavernous cylinders of the penis. (Bulb labeled at bottom center.)

| Image2 = Gray1156.png

| Caption2 = Vertical section of bladder, penis, and urethra. (Bulb visible at bottom center.)

| Precursor =

| System =

| Part_of = Penis

| Artery = Artery of bulb of penis

| Vein = Vein of bulb of penis

| Nerve =

| Lymph = Superficial inguinal lymph nodes

}}

The bulb of penis is the proximal/posterior bulged{{Cite web |title=bulbe du pénis - Dictionnaire médical de l'Académie de Médecine |url=https://www.academie-medecine.fr/le-dictionnaire/index.php?q=bulbe+du+p%C3%A9nis |access-date=2024-05-20 |website=www.academie-medecine.fr}} end of the (unpaired median) corpus spongiosum penis. Together with the two crura (one crus on each side of the bulb), it constitutes the root of the penis. It is covered by the bulbospongiosus.

Proximally/posteriorly, the bulb of penis extends towards the perineal body. The bulb exhibits a slight yet palpable midline notch upon its inferior aspect.

The male urethra enters the penis at the superior aspect of the anterior part of the bulb (most of the bulb is thus situated inferoposteriorly to the urethra), and the arteries of bulb of penis enter near the urethra.{{Cite book |last=Sinnatamby |first=Chummy S. |title=Last's Anatomy |publisher= Elsevier Australia|year=2011 |isbn=978-0-7295-3752-0 |edition=12th |pages=319}}

The bulb of penis is homologous to the vestibular bulbs in females.{{cite book|last=Clemente|first=Carmine D.|title = Clemente's Anatomy Dissector: Guides to Individual Dissections in Human Anatomy with Brief Relevant Clinical Notes (applicable for Most Curricula)| publisher = Wolters Kluwer/Lippincott Williams & Wilkins Health|year = 2010|page=205|access-date = September 29, 2023 |isbn= 978-1-60831-384-6 |url = https://books.google.com/books?id=V-M4CUkkZB0C&dq=%E2%80%9Cvestibular+bulbs%E2%80%9D+%E2%80%9Cpenile+bulb%E2%80%9D&pg=PA138}}