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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
- 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.
- Testes- Two pairs of testes are present inside testes sacs at the 10th and 11th segments. These are the sites of gametogenesis.
- 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.
- Spermiducal funnel- These are present in the 10th and 11th segments. These act as gateways of sperm reception and lead into vasa deferentia.
- Vasa deferentia- The vasa deferentia run from the 12th up to the 18th segment where they join the prostatic duct.
- 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.
- 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.
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