Mention the location and the function of Leydig cells. - Biology (Theory)

Short Note

Mention the location and the function of Leydig cells.



  1. Leydig cells are located in the testicular interstitial tissues surrounding the seminiferous tubules, in groups of up to 10 cells.
  2. The main function is to produce testosterone to maintain spermatogenesis and perform extra-testicular androgenic and anabolic actions.
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2022-2023 (March) Official


With the help of a neat, labelled diagram describe the human male reproductive system.

List two functions performed by the testis in human beings.

Fill in the blanks:

Humans reproduce __________.

Describe the human male reproductive system.

What are the major components of seminal plasma?

Identify True/False statements. Correct each false statement to make it true

Spermatozoa get nutrition from Sertoli cells. (True/False)

Identify True/False statements. Correct each false statement to make it true.

Leydig cells synthesise androgens. (True/False)

Pituitary dwarfism is treated with gene therapy by____

(A) Human insulin
(B) Tissue growth factor - Beta
(C) Tissue plasmogen activator
(D) Human growth hormone producer gene

What is the full form of IVF?

Give appropriate biological/technical terms for the following:

The accessory gland in human males whose secretion activates the

Differentiate between Human skin cell and Human ovum (number of chromosomes).

Write a note on human sperm

Draw a labelled diagram of L.S. of human testis.

Define Spermatogenesis

Define Reproductive health

Distinguish between the following pair of terms:

Egg and sperm.

State the reason why testes lie outside the abdomen in a scrotum?

List the structures, in their correct sequence, through which the sperms must pass from the time they are produced in the testes to the time they leave the urethra.

State the function of Testes.

Multiple choice question. Tick (✓) the correct choice:

Testis are present in a sac called

  1. scrotum
  2. oviduct
  3. epididymis
  4. none of the above

Fill in the blank:

The sac-like structure present outside the body and which contains testes is called _________.

Mention the functions of Testis.

Which part of the human body produces  Sperms?

Describe the male reproductive systems in humans.

What happens in a boy’s body under the influence of hormones?

What is semen? 

Describe the functions of the following:  


Differentiate between primary and accessory reproductive organs 

Define the following term: 


Given below is the schematic diagram of the sectional view of the human male reproductive system. 


Name the parts numbered 1-11.

Differentiate between Vas deferens and vasa efferentia.

Differentiate between Spermatogenesis and spermiogenesis.

With the help of labelled diagramms describe the structures of human sperm and unfertilized ovum. 
A couple is unable to conceive. Which modern techniques are available to overcome this problem? 

Draw a label diagram.
Draw a labeled diagram to show the interrelationship of four accessory ducts in a human male reproductive system. 


Urinogenital duct and Ureter.

Explain the term Scrotum.

Multiple Choice Question:

If the vas deference of a man are surgically disconnected or removed.

In humans, there are ____________ pairs of chromosomes.

In humans, sperm production occurs in the organ __________.

Find an odd one out.

How are the sperms formed?

How is the semen produced?

Write the functions of penis

Write the functions of Seminal vesicle

Draw a neat and labelled diagram.

Human male reproductive organs

Write the answers to the questions by observing the figure.

  1. What does the above figure show?
  2. Write the names of parts A, B, C, D.
  3. Write the function of the part 'D'.
  4. How is semen formed?

The large elongated cells that provide nutrition to developing sperms are ______

Name the secondary sex organs in males. 

Why are the human testes located outside the abdominal cavity? Name the pouch in which they are present.

What is the enzyme present in the acrosome of sperm?

The increased level of estrogen and progesterone is responsible for menstruation.

Identify the primary sex organs in males.

Identify the location of Leydig cells.

Identify the number of spermatids produced from 1 secondary spermatocyte.

Which hormone controls the secondary sexual characters in males?

How much semen is generally present in seminal fluid?

In the male reproductive system, the vasa efferentia opens into the ______.

Identify the labels (a, b, c, and d) in the given diagram of the male reproductive system.


Semen is secreted by ______.

Select the MISMATCHED pair.

Failure of testes to descend from abdomen into scrotum leads to ______.

Vasa efferentia are the ductules leading from ______.

The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is ______.

Seminal plasma in humans is rich in ______.

Increased secretion of which hormone start the process of sperm formation at the time of puberty?

Semen is a constituent of seminal plasma with ______.

ells of Leydig occur in ______.

The function of the secretion of prostate gland is to ______.

Seminal plasma in human males is rich in ______.

In human males, the testes lie in the scrotum, because it helps in the ______ 

A pair of ducts arising from testis, which carries sperms are ______ 

In the following Question, the Assertion and Reason have been put forward. Read the statements carefully and choose the correct alternative from the following:

Assertion: In the male reproductive system, the transport of sperm takes place in a fluid that also provides nutrition.

Reason: Protective glands and seminal vesicles secret in the vas deferens.

The correct sequence of organs in the male reproductive system for transport of sperms is

Give two reasons for the appearance of variations among the progeny formed by sexual reproduction.

Why do only male gametes have a tail?

Crypts of Lieberkuhn are absent in ______.

Mature sperms in humans are stored in ______.

The shared terminal duct of the reproductive and urinary system in the human male is ______.

The Leydig cells as found in the human, body are the secretory source of ______.

Cell at the end of first meiotic division male sperm differentiates into ______.

______ is the smallest cell in males.

______ carries sperms to the seminal vesicles.

The process of formation of sperms is known as ______.

Small sac-like muscular structures that enclose testes.

Give reasons for the following

Scrotum remains outside the body of human males.

Accessory glands of male reproductive system are

Vasa efferentia exist in between:

Which one of the following is not a male accessory gland?

How do sperms develop?

Sketch and label Human Male Reproductive System.

Write briefly about the Testis.

Given below is a certain situation. Analyze and describe its possible impact on a person:

Testes of a male boy are not able to descend into the scrotum during his embryonic development.

Given below is a certain situation. Analyze and describe its possible impact on a person:

Prostate and seminal vesicles are not functional.

Give significance of Leydig's cells.

Give reason: Testes are located outside the body cavity in scrotal sacs.

List two roles of Seminal vesicles and prostate gland in the human reproductive system.

List two roles of the Testis in the human reproductive system.

Answer the following question based on the human male reproductive system:

In which organ sperms are formed?

Answer the following question based on the human male reproductive system:

What is the length of a sperm?

Answer the following question based on the human male reproductive system:

What is the work of vas deferens?

Answer the following question based on the human male reproductive system:

By which type of cell division, sperms are formed?

Answer the following question based on the human male reproductive system:

Name any two unpaired organs of male reproductive system


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