Question

During chilling conditions, which of the following is responsible for bringing the testes closer to the pelvic cavity?

• A. Cardiac muscles
• B. Cremaster muscles
• C. Dartos fascia
• D. Gubernaculum

Answer 1

The correct option is B Cremaster muscles

Just below the outer skin of the scrotum, a layer of fascia is present known as dartos fascia. This layer is devoid of fats and contains smooth muscle fibres collectively called dartos muscles.
Associated with each testis, a series of small bands of skeletal muscles called cremaster muscles are also present.
In response to cold temperature, both the cremaster and dartos muscles contract.
The contraction of cremaster muscles moves the testes closer to the body so that they can absorb heat.
Contraction of dartos muscles causes the scrotum to become tight (wrinkled in appearance), which reduces heat loss.
Cardiac muscles are found in the heart and are responsible for the contraction of heart muscles that help in pumping blood throughout the entire body.
The fibrous cord that connects the testes to the wall of the scrotum is called gubernaculum.