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प्रश्न
Describe the human male reproductive system.
Describe in brief the male reproductive system of human.
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उत्तर
The human male reproductive system comprises testes, epididymis, vas deferens, Cowper’s glands, prostate gland and penis.
- Testes
- Testes produce male gametes and sperms.
- To maintain the temperature 2–3°C lower than the body temperature, the scrotum is located outside the body cavity.
- Epididymis
- The epididymis stores sperms temporarily.
- Vas deferens
- Each epididymis continues further as a sperm duct or vas deferens.
- Seminal vesicles
- The seminal vesicles produce a secretion which is responsible for the transport of sperms.
- Prostate gland
- It is a bilobed structure which surrounds the urethra.
- It pours an alkaline secretion into the semen.
- Cowper’s glands
- These are two small ovoid glands.
- They open into the urethra.
- Its secretion serves as a lubricant.
- Penis
- The urethra passes through the penis.
- It carries either urine or semen at a given time.
- Scrotum
- A skin-covered pouch outside the body cavity that houses the testes.
- Keeps testes 2–3°C cooler than body temperature for normal spermatogenesis (via dartos & cremaster muscle adjustments, sweat glands)
- Urethra
- Common duct for urine and semen (not at the same time).
- About 18–20 cm long in males; parts: prostatic → membranous → spongy (penile).
- Internal urethral sphincter prevents urine mixing during ejaculation and opens at the external urethral meatus at the tip of the penis.
संबंधित प्रश्न
List two functions performed by the testis in human beings.
Humans are ______.
Describe the structure of a seminiferous tubule.
Identify True/False statement. Correct false statement to make it true.
Leydig cells synthesise androgens.
find odd one from following: Thymine, Cytosine, Adenine, Pepsin.
Draw a labelled diagram of L.S. of human testis.
Define Spermatogenesis.
Put a tick mark (✓) against the correct alternative in the following statement:
Identify the stage which is formed after the fertilisation of the egg by the sperm?
State the reason why testes lie outside the abdomen in a scrotum?
State the function of Testes.
What happens in a boy’s body under the influence of hormones?
Given on the right is a diagram which represents the reproductive organs of a man:
(i) Write the names of the parts numbered 1 to 16.
(ii) Give two functions of the part 6.
(iii) Name three components of the fluid which may be found in the tube labeled 2.
(iv) What is the main function of the part labelled 3?
Differentiate
Urinogenital duct and Ureter.
Identify the location of Leydig cells.
Which of the following correctly describes the gubemaculum?
Which hormone controls the secondary sexual characters in males?
Which is the duct that carries sperms from testes and opens into the epididymis?
Vasa efferentia are the ductules leading from ______.
Seminal plasma in human males is rich in ______.
Mark the odd one.
Along the path of the vas-deferens the secretions of which gland provide nutrition to the sperms?
______ is the smallest cell in males.
The given statement is incorrect. Rewrite the correct statement:
Seminiferous tubules secrete Testosterone.
The male accessory gland whose secretion neutralizes the acidity of the urethra and vagina is ______.
What is the whitish, viscous fluid secreted by glands along with spermatozoa called?
Each testis is divided into approximately how many compartments called testicular lobules?
Which three glands produce secretions that collectively form the seminal plasma?
The penis is composed of which type of tissue that enables erection during insemination?
What is the enlarged tip of the penis called?
