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  • The gateways of sperm reception in earthworms are  Option: 1 Testes  Opti

The gateways of sperm reception in earthworms are

 

Option: 1

Testes

 


Option: 2

Spermiducal funnel

 


Option: 3

Prostate gland

 


Option: 4

Accessory glands


Answers (1)

Reproduction and Development in Earthworm

  • Earthworm is hermaphrodite, that is, male and female reproductive organs are present in the same individual. 
  • Earthworms do not self-fertilize because testes mature earlier than the ovaries. 

Male reproductive system

  • It consists of the following structures
  1. Testes sacs- There are two pairs of testes sacs present in the 10th and 11th segments. Each sac encloses a testis and a spermiducal funnel.
  2. Testes- Two pairs of testes are present inside testes sacs at the 10th and 11th segments. These are the sites of gametogenesis.
  3. Seminal vesicles- These are two pairs of structures present in the 11th and 12th segments. The process of development to the maturation of spermatozoa takes place inside them.
  4. Spermiducal funnel- These are present in the 10th and 11th segments. These act as gateways of sperm reception and lead into vasa deferentia.
  5. Vasa deferentia- The vasa deferentia run from the 12th up to the 18th segment where they join the prostatic duct.
  6. Prostate gland- lie one in each side of the gut from the 16th to the 21st segments. They produce a secretion that serves as a medium for the transfer of sperm. 
  7. Accessory glands- Two pairs of accessory glands are present one pair each in the 17th and 19th segment. 

 

  •  

- Spermiducal funnel- These are present in the 10th and 11th segments. These act as gateways of sperm reception and lead into vasa deferentia.

 

Posted by

Sumit Saini

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