IGCSE Biology 4 Views 1 Answers
Identify on diagrams and state the functions of the following parts of the male reproductive system: testes, scrotum, sperm ducts, prostate gland, urethra and penis
Identify on diagrams and state the functions of the following parts of the male reproductive system: testes, scrotum, sperm ducts, prostate gland, urethra and penis
Answered step-by-step
The male reproductive system consists of several key structures, each with specific functions. Below is a description of the following parts: testes, scrotum, sperm ducts (vas deferens), prostate gland, urethra, and penis. Diagrams can typically be found in anatomy textbooks or online health resources, but here’s a detailed overview of each part and its function.
1. Testes
- Description: The testes are two oval-shaped organs located within the scrotum. They are responsible for producing sperm and hormones, primarily testosterone.
- Function:
- Spermatogenesis: The testes contain seminiferous tubules where sperm cells are produced.
- Hormone Production: They also produce testosterone, which is crucial for the development of male secondary sexual characteristics and reproductive function.
2. Scrotum
- Description: The scrotum is a pouch of skin that holds and protects the testes. It is located behind and below the penis.
- Function:
- Temperature Regulation: The scrotum maintains the testes at a temperature slightly lower than body temperature, which is essential for optimal sperm production and viability.
- Protection: It also provides a protective environment for the testes.
3. Sperm Ducts (Vas Deferens)
- Description: The vas deferens is a muscular tube that transports sperm from the epididymis (where sperm mature) to the ejaculatory duct.
- Function:
- Sperm Transport: It carries sperm during ejaculation and connects to the seminal vesicles and prostate gland to mix sperm with seminal fluid to form semen.
4. Prostate Gland
- Description: The prostate gland is a walnut-sized gland located below the bladder and surrounding the urethra.
- Function:
- Fluid Secretion: It produces a slightly alkaline fluid that nourishes and protects sperm, aiding in their motility and survival within the female reproductive tract.
- Seminal Fluid Formation: This fluid constitutes a significant portion of semen.
5. Urethra
- Description: The urethra is a tube that runs through the penis, connecting the bladder to the outside of the body.
- Function:
- Dual Role: It serves as a passageway for urine from the bladder and for semen during ejaculation. This dual function is essential for reproductive and urinary systems.
6. Penis
- Description: The penis is the external organ used for sexual intercourse and urination. It consists of erectile tissue that can fill with blood, causing an erection.
- Function:
- Semen Delivery: During ejaculation, the penis delivers semen into the female reproductive tract.
- Urination: It also serves as a conduit for urine to exit the body.
Summary Table
Structure | Description | Function |
---|---|---|
Testes | Oval organs in scrotum | Produce sperm and testosterone |
Scrotum | Pouch of skin holding testes | Protects testes; regulates temperature for optimal sperm production |
Vas Deferens | Muscular tube transporting sperm | Carries sperm from epididymis to ejaculatory duct |
Prostate Gland | Walnut-sized gland below bladder | Produces alkaline fluid; nourishes sperm; forms part of semen |
Urethra | Tube running through penis | Passageway for urine and semen |
Penis | External organ for sexual intercourse | Delivers semen during ejaculation; allows urination |
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