Earthworm

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Digestive system

It is a straight tube and runs from the first to the last segments. It consists of mouth(peristomium),buccal cavity , pharynx, oesophagus,a muscular gizzard, stomach, intestine and anus

Slide 12

Circulatory system

In earthworm ,the circulation is closed type.The circulatory system consists of heart, blood vessels, capillaries and blood glands

Slide 13

Excretory system

Nephridia

Segmentally arranged nephridia are the excretory organs.

There are three types of nephridia

septal,

integumentary and

pharyngeal.

Slide 14

Nervous System

The nervous system consists of segmentally arranged ganglia and a ventral nerve cord. A ganglion is a mass of nerve cells.

Nerve ring

Ventral Nerve cord

Sense Organs

Slide 15

Reproductive system

Earthworm is hermaphrodite or bisexual .

Male reprodutive organs

Testis

Seminal vesicles

Semimal funnels

Vasa differentia

Prostate glands

Slide 16

Female reproductive system

Ovaries

Oviduccal funnels

Oviducts

Spermatheca

surendranaduthila@gmail.com

Slide 17

Interaction With Mankind

WORM CAST

VERMI COMPOSTING

FOOD

MEDICINE

Slide 18

thanks

SURENDRAN. K