CBSE Class 10 Science 2020 · Paper 31/5/1 · Question 28(a)
Based on the given diagram answer the questions given below :
- (a)Label the parts A, B, C and D.
- (b)Name the hormone secreted by testis and mention its role.
- (c)State the functions of B and C in the process of reproduction.
Answer
A is the ureter, B the seminal vesicle, C the urethra, D the vas deferens; the testis secretes testosterone, which regulates sperm formation.
(a) A is the ureter, B the seminal vesicle, C the urethra and D the vas deferens (sperm duct). (b) The testis secretes the hormone testosterone. Its role: it regulates the formation of sperms, and it brings about the changes in appearance seen in boys at the time of puberty. (c) B, the seminal vesicle, adds its secretion to the sperms, so that they are in a fluid that provides them nutrition and makes their transport easier. C, the urethra, is the common passage for both sperms and urine; it carries the sperms out of the body.
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