Advertisements
Advertisements
प्रश्न
Why are testes located outside the abdominal cavity? What is responsible for bringing about changes in appearance seen in boys at the time of puberty?
उत्तर
Testes are located outside the abdominal cavity, within a pouch called the scrotum. For the production of sperms, testes require a temperature that is 2–2.5 °C lower than the temperature of the rest of the body. That is why testes are protected inside the scrotum. The hormone testosterone is responsible for the development of secondary sex characteristics in boys.
APPEARS IN
संबंधित प्रश्न
List any four methods of contraception used by humans. State in brief two advantages of adopting such preventive methods.
List two functions ovary of human female reproductive system.
Which structure in human female is equivalent to the testes in the male?and in what respect the structures are equivalent?
Fertilisation results immediately in the formation of :
(a) a zygote
(b) an embryo
(c) a placenta
(d) a foetus
In a flower, the parts that produce male and female gametes are respectively :
(a) sepal and anther
(b) filament and stigma
(c) anther and ovary
(d) stamen and style
In male and female reproductive system of human, ______ gland is same.
Fill in the blank.
Pollen grains are formed by ______ division in locules of anthers.
The below diagram is of a developing embryo is a mother’s womb:
(i) Write the functions of the placenta, amnion, and umbilical cord.
(ii) How are the waste products of a fetus removed?
(iii) What is the gestation period?
Human eggs are______.
During adolescence, reproductive phase starts and ______.
