Penis

Definition

The penis is the male external reproductive organ that serves multiple functions including urination and sexual intercourse. It consists of erectile tissue that can engorge with blood to facilitate erections, allowing for penetration during sexual activity. The penis also contains the urethra, which is the channel through which urine and semen exit the body, linking the urinary and reproductive systems.

5 Must Know Facts For Your Next Test

1. The penis is composed of three main parts: the root (which connects to the pelvic bones), the body (or shaft), and the glans (the tip or head).
2. Erections are triggered by sexual arousal, physical stimulation, or even certain thoughts, resulting in increased blood flow to the erectile tissues.
3. The average size of an erect penis varies widely but generally ranges between 5 to 7 inches in length.
4. The foreskin, a fold of skin covering the glans, is present at birth and can be removed through circumcision; its presence or absence can influence sensitivity.
5. Sexual health issues related to the penis include erectile dysfunction, Peyronie's disease (curvature of the penis), and infections such as sexually transmitted infections.

Review Questions

• How does the structure of the penis support its functions in reproduction and urination?
  • The structure of the penis is specifically designed to support both reproductive and urinary functions. It contains erectile tissue that allows for erection during sexual arousal, facilitating penetration for reproduction. Additionally, the urethra runs through the penis, allowing for the passage of urine and semen. This dual function is crucial for male physiology, connecting both systems effectively.
• Discuss how factors like age and health can impact erectile function in males.
  • Erectile function can be significantly affected by age and overall health. As men age, hormonal changes and reduced blood flow can lead to difficulties in achieving or maintaining an erection. Health conditions such as diabetes, hypertension, and cardiovascular disease can also impair erectile function by affecting blood vessels and nerve signaling. Lifestyle choices like smoking and obesity further contribute to these issues, highlighting the interplay between health and sexual function.
• Evaluate the cultural significance of circumcision practices and their implications on male sexuality.
  • Circumcision practices vary widely across cultures and religions, often carrying significant cultural meaning. In some societies, it is seen as a rite of passage or a religious obligation, while in others it may be associated with health benefits or aesthetic preferences. The implications on male sexuality can be complex; while some studies suggest that circumcision may reduce sensitivity due to removal of the foreskin, others argue it has no substantial impact on sexual pleasure. Understanding these perspectives provides insight into how cultural beliefs shape attitudes toward male sexuality.

Related terms

Erectile Tissue: A type of tissue that can fill with blood and swell, leading to an erection; it plays a crucial role in sexual arousal.

Urethra: The duct through which urine and semen are expelled from the body, running through the penis.

Circumcision:

The surgical removal of the foreskin from the penis, often performed for religious or health reasons.