Podcast
Questions and Answers
Which cells are responsible for the production of spermatozoa in the testis?
Which cells are responsible for the production of spermatozoa in the testis?
- Leydig cells
- Basement membrane cells
- Sertoli cells
- Spermatogenic cells (correct)
What is the function of Leydig cells in the testis?
What is the function of Leydig cells in the testis?
- Formation of the tunica albuginea
- Secretion of testosterone (correct)
- Production of spermatozoa
- Supporting the spermatogenic cells
What is the purpose of the tunica albuginea in the testis?
What is the purpose of the tunica albuginea in the testis?
- Secretion of testosterone
- Production of spermatozoa
- Supporting the testicular connective tissue (correct)
- Formation of the germinal epithelium
Where are the Sertoli cells located in the testis?
Where are the Sertoli cells located in the testis?
What is the function of the ciliated columnar cells present in the ductuli efferentes?
What is the function of the ciliated columnar cells present in the ductuli efferentes?
Which epithelium lines the ductus epididymis?
Which epithelium lines the ductus epididymis?
What is the function of the phagocytic cells in the ductus epididymis?
What is the function of the phagocytic cells in the ductus epididymis?
Which layer of the ductus deferens is composed of connective tissue rich in elastic fibers?
Which layer of the ductus deferens is composed of connective tissue rich in elastic fibers?
What is the function of the seminal plasma produced by the accessory glands?
What is the function of the seminal plasma produced by the accessory glands?
Which portion of the prostate surrounds the pelvic urethra?
Which portion of the prostate surrounds the pelvic urethra?
What is the function of the bulbourethral gland secretion product?
What is the function of the bulbourethral gland secretion product?
Which erectile tissue surrounds the penile urethra all the way?
Which erectile tissue surrounds the penile urethra all the way?
What forms a septum that penetrates between the two penile corpora cavernosa?
What forms a septum that penetrates between the two penile corpora cavernosa?
Which part of penis is mainly formed by erectile tissue?
Which part of penis is mainly formed by erectile tissue?
Which cells are present in the epididymal ductuli efferentes?
Which cells are present in the epididymal ductuli efferentes?
What do venous sinuses compose?
What do venous sinuses compose?
Which cells continue to divide, while others differentiate into primary spermatocytes?
Which cells continue to divide, while others differentiate into primary spermatocytes?
What connects intercellularly derived cells from a single spermatogonia?
What connects intercellularly derived cells from a single spermatogonia?
What is responsible for male sexual characteristics?
What is responsible for male sexual characteristics?
Where do developing spermatids reside within the testes?
Where do developing spermatids reside within the testes?
What forms the acrosomal cap over the nucleus of spermatozoa?
What forms the acrosomal cap over the nucleus of spermatozoa?
Which part of the sperm tail is subdivided into neck, middle piece, principal piece, and end piece?
Which part of the sperm tail is subdivided into neck, middle piece, principal piece, and end piece?
What prevents the entry of substances into the adluminal compartment of the testes?
What prevents the entry of substances into the adluminal compartment of the testes?
Where are straight tubules initially composed solely of Sertoli cells located?
Where are straight tubules initially composed solely of Sertoli cells located?
What transports sperm to the epididymis?
What transports sperm to the epididymis?
What is produced by Leydig cells and is responsible for male sexual characteristics?
What is produced by Leydig cells and is responsible for male sexual characteristics?
Study Notes
- Spermatogonia, located in the seminiferous tubules, undergo mitosis at sexual maturity.
- Type A spermatogonia continue to divide, while type B spermatogonia differentiate into primary spermatocytes.
- Primary spermatocytes enter meiosis and form secondary spermatocytes and spermatids.
- Cytoplasmic bridges connect intercellularly derived cells (primary and secondary spermatocytes and spermatids) from a single spermatogonia.
- Spermiogenesis involves changes in the Golgi complex, including the production of an acrosome, which covers the nucleus and forms the acrosomal cap.
- Spermatozoa have a head and a tail, with the head's shape determined by the species and the nucleus.
- The sperm tail is subdivided into the neck, middle piece, principal piece, and end piece.
- Sertoli cells, part of the germinal epithelium, provide support, protect, and control nutrition for developing sperm.
- Sertoli cells have a pyramidal shape and contain numerous invaginations where developing spermatids reside.
- Sertoli cells are linked together by occluding zonules, forming the blood-testis barrier, which prevents the entry of substances into the adluminal compartment.
- Interstitial or Leydig cells, found in the stroma, produce testosterone, which is responsible for male sexual characteristics.
- Straight tubules, the initial part of which is composed solely of Sertoli cells, lead to the intratesticular ducts, which transport sperm to the epididymis.
- Testis capillaries are fenestrated, allowing the free passage of macromolecules to the interstitial space.
- The seminiferous tubules are surrounded by connective tissue, nerves, blood and lymphatic vessels.
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Description
This lesson covers the structure and function of the male reproductive system, including the testes, genital ducts, accessory glands, and penis. It also discusses the dual role of the testis as both an exocrine and endocrine gland.
