Scrotum FAQ

  Scrotum Frequently Asked Questions

The following are some of the most common and frquently asked questions on scrotum or scrotal bag. Ofcourse there are more questions, but they are largely iterations of the same questions with aleterd wordings and similar gist.

What are scrotum temperatures?

The temperature of the scrotum is usually 2 - 3 °C lower than the normal body temperature. This is the temperature at which spermatogenesis occurs in testes and sperms cannot survive higher body temperature. 

Why is scrotum important?

Scrotum is a skin pouch that contains testes. Testes produces sperms and testosterone. Sperms are necessary for reproduction while testosterone is essential for reproduction, normal sexual activity and masculine features. 

Can scrotum transmit HIV?

HIV infection is transmitted primarily by blood and ejaculate of an HIV infected male. Since scrotum does not ejaculate semen, it cannot transmit HIV. However, if blood from a bleeding pimple or rash located on scrotum comes in direct contact with the blood of the partner or other person, there is a chance of HIV transmission. Please contact your doctor for more information. 

Can scrotum be plural?

No. Atleast not in humans. However, there is a chance of having more than 1 scrotum due to congenital anomaly. But in normal condition, scrotum is always one.

What scrotum means?

Scrotum means a bag.

What is scrotum and what is it’s function?

Scrotum is a bag made up of loose skin and subcutaneous layer. The following are the functions of the scrotum:
1. To contain testes and provide them with primary protection.
2. Support spermatogenesis and other normal functions of testes by regulating the temperature of the testes. 

What causes scrotum to tighten?

In response to cold temperatures, dartos muscles and cremaster muscles contract. Contraction of cremaster muscles brings testes closer to the body to absorb heat. Contraction of dartos muscles shrinks the scrotum to reduce heat loss. This shrinkage of scrotum leads to its wrinkled appearance. The exact opposite to this happens when scrotum is exposed to hot temperatures. 

When does scrotum tightens?

Scrotum tightens when it is exposed to cold temperatures and it loosens when it is exposed to warm or hot temperatures.

Where is scrotum in human body?

Scrotum is located outside the pelvic cavity between the 2 legs behind (posterior to) penis.

Testicle vs scrotum difference

  • Testicle is an organ, a gonad to be precise. It’s main functions are to produce sperms and testosterone.
  • Scrotum is a structure made up of loose skin. It’s main functions are to contain and protect the testes and to regulate the temperature of the testes.

Anatomy of scrotum 

  • It is a supporting structure for testes.
  • It consists of loose skin and an underlying subcutaneous layer that hangs from the root of the penis.
  • External appearance looks like it is separated into 2 lateral portions by a median ridge called 'Raphae'.
  • Internally, scrotal septum divides scrotum into 2 compartments, each containing 1 testis. This septum is made up of subcutaneous layer and the muscle tissue is called 'Dartos muscle'. Dartos muscle is composed of smooth muscle fibres.
  • A series of small bands of skeletal muscles descending as an extension to internal oblique muscles through spermatic cord surrounds the testes. This is known as 'Cremaster muscles'.
Please refer the diagram below for a visual correlation of what's written above. Please note that this diagram is meant to help visualise a clear simplifies picture.

Scrotum diagram

Scrotum diagram by Dhruv K. Mangukia

Scrotum cancer or scrotal lump

Scrotal lump could be due to an accumulation of fluids, growth of abnormal tissue, or swelling and inflammation of the normal contents of the scrotum. These lumps needs to be examined by the doctor even if there is no pain or other symptoms. These lumps may affect the normal health and functioning of the testicles.

Other reason for a scrotal lump is an infection. If such is the case than fever, increased urinary frequency and blood or pus in urine are the symptoms.

Inguinal hernia can also cause a lump in the scrotum.

Other reasons for a scrotal lump could be: spermatocele, hydrocele, varicocele, hematocele, testicular torsion, epididymitis, orchitis, and testicular torsion.

More on this will be discussed in testicular cancer. 

Feel free to contact me if you feel that I have missed something.