Earthworm Dissection Lab

Earthworm dissection Vu- PAP Bio- 2


An earthworm is a segmented animal that feeds on dead and alive organic matter. Earthworms are hermaphrodites and are also invertebrates. "Earthworm" is the common name for the largest group of Oligochaeta in the phylum Annelida. Earthworms live in only healthy environments where there is plenty of water. Unlike most animals, earthworms can regenerate their body. They also provide lots of nutrients for our soil.

Earthworm Objectives

Students will learn about an earthworm's body parts, digestive system, circulatory system, and other background info. They will also learn the important role of earthworms in our ecosystems. They also will learn these things from previous dissections.

Earthworms Dissection Lab

Earthworm Dissection
Big image
Big image

Earthworm Circulatory System

Circulatory System

The earthworm exhibits a closed circulatory system. Earthworms have 3 main ways of getting blood to their main organs. These 3 ways are the dorsal blood vessels, ventral blood vessels, and aortic arches. The (5) aortic arches pump blood to the ventral and dorsal blood vessels. The dorsal vessels pump blood to the front of the worm, and ventral vessels pump blood to the back of the earthworm.

Interesting Facts

1. Earthworms have no legs, eyes, or arms.

2. There can be more than a million earthworms in one acre of land.

3. Earthworms are coldblooded.

4. If a earthworms skin dries out it will die.

5. Worms can eat the same amount as their weight everyday.

6. Charles Darwin studied earthworms for 39 years over a hundred years ago.

7. The largest earthworm ever found was 22 feet long in South Africa. ( craziness)

8. A 12 foot worm only weighs 1 pound.

9. Worms keep traveling until they find a perfect location.

10. Worms feed on soil.