Human Reproduction Flashcards
(28 cards)
What type of reproduction do humans engage in?
Sexual reproduction
Humans are viviparous, meaning they give birth to live young.
What is gametogenesis?
Formation of gametes
In males, it produces sperms, and in females, it produces ova.
What is the process of transferring sperms into the female genital tract called?
Insemination
What occurs during fertilisation?
Fusion of male and female gametes leading to the formation of a zygote
What is the sequence of events following fertilisation?
Formation of blastocyst, implantation, embryonic development, parturition
Parturition is the delivery of the baby.
At what life stage do reproductive events occur in humans?
After puberty
What is a key difference between male and female gamete formation?
Sperm formation continues in old men, while ovum formation ceases around fifty years in women
Where is the male reproductive system located?
Pelvis region
What are the main components of the male reproductive system?
A pair of testes, accessory ducts, glands, and external genitalia
Where are the testes situated?
Outside the abdominal cavity within a pouch called scrotum
What is the role of the scrotum?
Helps in maintaining a low temperature necessary for spermatogenesis
What is the temperature difference maintained by the scrotum for the testes?
2-2.5° C lower than the normal internal body temperature
What is the shape and approximate size of each testis in adults?
Oval in shape, about 4 to 5 cm long and 2 to 3 cm wide
What covers the testis?
A dense covering
How many compartments does each testis have?
About 250 compartments called testicular lobules
What do Leydig cells synthesize and secrete?
Testicular hormones called androgens
What types of cells are found inside seminiferous tubules?
Male germ cells (spermatogonia) and Sertoli cells
What is the function of Sertoli cells?
Provide nutrition to the germ cells
What process do male germ cells undergo to form sperm?
Meiotic divisions
What are the male sex accessory ducts?
Rete testis, vasa efferentia, epididymis, and vas deferens
How do the seminiferous tubules connect to the vasa efferentia?
They open into the vasa efferentia through rete testis
What is the function of the epididymis?
Stores and transports sperms from the testis
Where does the vas deferens ascend to?
The abdomen
What does the vas deferens receive from the seminal vesicle?
A duct that opens into the urethra as the ejaculatory duct
