Penis

Definition

The penis is the male reproductive organ responsible for urination and sexual intercourse. It is a cylindrical structure composed of spongy tissue that becomes engorged with blood during sexual arousal, causing it to become erect and increase in size and rigidity.

5 Must Know Facts For Your Next Test

1. The penis is composed of three main structures: the corpus cavernosum, the corpus spongiosum, and the glans penis.
2. The corpus cavernosum is the primary erectile tissue that becomes engorged with blood during sexual arousal, causing the penis to become erect.
3. The urethra runs through the center of the penis, allowing for the passage of urine and semen during urination and ejaculation.
4. The glans penis, or the head of the penis, is the most sensitive part and is covered by the foreskin in uncircumcised individuals.
5. The penis plays a crucial role in both the urinary and reproductive systems, facilitating the elimination of waste and the transfer of sperm during sexual intercourse.

Review Questions

• Describe the main anatomical structures of the penis and their functions.
  • The penis is composed of three primary structures: the corpus cavernosum, the corpus spongiosum, and the glans penis. The corpus cavernosum is the main erectile tissue that becomes engorged with blood during sexual arousal, causing the penis to become erect. The corpus spongiosum surrounds the urethra, which runs through the center of the penis, allowing for the passage of urine and semen. The glans penis, or the head of the penis, is the most sensitive part and is covered by the foreskin in uncircumcised individuals. These structures work together to facilitate both urinary and reproductive functions.
• Explain the role of the penis in the male reproductive system.
  • The penis plays a crucial role in the male reproductive system. During sexual intercourse, the corpus cavernosum becomes engorged with blood, causing the penis to become erect and rigid. This allows the penis to enter the female reproductive tract and deposit semen containing sperm, which can then fertilize the female's egg. The urethra, which runs through the center of the penis, also serves as the pathway for the ejaculation of semen during orgasm, completing the reproductive function of the penis.
• Analyze the potential impact of penile dysfunction on a man's overall health and well-being.
  • Penile dysfunction, such as erectile dysfunction or Peyronie's disease, can have significant impacts on a man's physical and psychological well-being. Erectile dysfunction, the inability to achieve or maintain an erection, can lead to difficulties with sexual intercourse and feelings of inadequacy, potentially affecting self-esteem and relationships. Peyronie's disease, characterized by the development of scar tissue in the penis, can cause curvature, pain, and further sexual dysfunction. These conditions can also be indicators of underlying health issues, such as cardiovascular disease or diabetes, that require medical attention. Addressing penile dysfunction through appropriate treatment and management is crucial for maintaining overall male reproductive and sexual health.

Related terms

Urethra: The tube that carries urine from the bladder out of the body, passing through the center of the penis.

Corpus Cavernosum: The two cylindrical chambers of spongy tissue within the penis that fill with blood during an erection.

Glans Penis: The rounded, sensitive tip of the penis, also known as the head of the penis.