Question

Which one of the following is not a part of male penis ?
A. Corpora cavernosa
B. Glans
C. Urethra
D. Seminiferous tubules

Answer 1

The male reproductive system is located in the pelvis region. It includes a pair of testes along with accessory ducts, glands and the external genitalia. It also includes urethra, penis etc. The testes are situated outside the abdominal cavity within a pouch called scrotum. The scrotum helps in maintaining the low temperature of the testes which is 2 to 2.5 degree Celsius lower than the normal internal body temperature which is necessary for spermatogenesis.

Complete Answer:
- The penis is the male external genitalia. It is made up of special tissue that helps in erection of the penis to facilitate insemination.
- The enlarged end of the penis called the glans penis is covered by a loose fold of skin called foreskin.
- The male urethra provides a common pathway which is responsible for the flow of urine and semen.
- The erectile tissue which is responsible for the erection. It is supported by fibrous tissue and covered with skin and has a rich blood supply.
- The two lateral columns are called corpora cavernosa and the column between them contains the urethra, the corpus spongiosum.
- As we know testis is made by testicular lobules. Each testicular lobule contains highly coiled one to three seminiferous tubules in which sperm are produced.

So the correct answer is (D).

Note: Each seminiferous tubules is lined on its inside by two types of cells called male germ cells and Sertoli cells. In adults the testis is oval in shape. The testis is covered by a dense covering. Each testes has about 250 compartments called testicular lobules.