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प्रश्न
Describe the structure of a seminiferous tubule.
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उत्तर
The production of sperm in the testes takes place in a highly coiled structure called the seminiferous tubules. These tubules are located in the testicular lobules. Each seminiferous tubule is lined by germinal epithelium. It is lined on its inner surface by two types of cells: spermatogonia and Sertoli cells. Spermatogonia are male germ cells that give rise to primary spermatocytes through meiotic divisions. Primary spermatocytes undergo further meiotic division to form secondary spermatocytes and finally, spermatids. Spermatids later metamorphose into male gametes called spermatozoa. Sertoli cells are known as nurse cells of the testes, as they provide nourishment to the germ cells. There are large polygonal cells known as interstitial cells or Leydig cells just adjacent to the seminiferous tubules. These cells secrete the male hormone called testosterone.
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संबंधित प्रश्न
Humans are ______.
Identify True/False statement. Correct false statement to make it true.
Androgens are produced by Sertoli cells.
Identify True/False statement. Correct the false statement to make it true.
Leydig cells are found in the ovary.
State the function of Testes.
State the function of Seminal vesicle.
Which part of the human body produces Sperms?
Which one of the following is the correct route that a sperm follows when it leaves the testis of a mammal ?
Mention the exact location of the following:
Testis
Name the various organs of the male reproductive system of man.
In humans, sperm production occurs in the organ ______.
State names of organs in male reproductive system.
The large elongated cells that provide nutrition to developing sperms are ______
In the given diagram represents the
Which hormone controls the secondary sexual characters in males?
The ______ lead to vas deferens that ascends to the ______ and loops over the ______.
In the process of spermatogenesis, first maturation division is called ______.
Occurrence of Leydig’s cells and their secretion is ______.
Location and secretion of Leydig’s cells are ______.
Seminal plasma in human males is rich in ______.
Secretions from which one of the following are rich in fructose, calcium, and some enzymes?
In human males, the testes lie in the scrotum, because it helps in the
______ carries sperms to the seminal vesicles.
What is the length of the sperm?
List two roles of the Testis in the human reproductive system.
Draw a labelled diagram of the male reproductive system.
Name the following:
Three accessory glands of human male reproductive system.
Can there be any abnormal situation regarding testes location? If so, what is that and what is the harm caused due to it?
The figure given below is an important gonad of humans. Study the figure and answer the following questions.
 |
- Identify the organ. Write its specific location in the body.
- Label the parts shown in the figure as 1 to 4.
- Write important functions of parts 2 and 4.
- Name one cellular structure and one hormone which are produced in part 3.
- Draw a neat and labelled diagram of the cellular structure mentioned by you in (d).
Each testis is divided into approximately how many compartments called testicular lobules?
What are spermatogonia?
