WHAT GOES ON INSIDE AN EARTHWORM’S HEAD?

1) PSEUDOHEARTS

Earthworms have multiple pairs of pseudohearts, socalled because they don’t pump blood, rather they squeeze one of the main blood vessels to help move blood around the body.

2) SEMINAL VESICLES

Worms are hermaphrodite, meaning they have both male and female sex organs. The worm’s own sperm are stored here.

3) MUSCULAR AREA

Contains the tiny pin headsized brain, oesophagus and pharynx.

4) SPERMATECEA

Sperm from other worms are stored in these tiny sacs.

5) CROP AND GIZZARD

These areas are used to process food. Food passes into the crop and is then ground down in the gizzard.

6) BLOOD VESSEL

Unlike most invertebrates, earthworms have the oxygen-carrying molecule haemoglobin in their blood.