In this article, we cover earthworm anatomy and how to dissect and earthworm safely in the lab of a college or university.

From front to back, the basic shape of the earthworm is a cylindrical tube-in-a-tube, divided into a series of segments (called metameres) that compartmentalize the body.

The earthworms each have two male openings and two sperm receptacles, which take in the sperm from another mate. The earthworms have a pair of ovaries that produce eggs.

Oct 31, 2025 · Earthworms are a group of terrestrial annelids that constitute the suborder Lumbricina. They are characterized by an elongated, segmented body equipped with bristle-like hair for …

In this article we will discuss about the external and internal anatomy of earthworm. This will also help you to draw the structure and diagram of earthworm. External Anatomy of Earthworm: The body of …

Interactive Inside of an earthworm The earthworm’s body is well adapted for life in the soil. Click on the labels to see images and learn more. Click the green button to see what’s on the outside of an …

Apr 12, 2024 · Morphologically, earthworms possess a segmented body plan, both externally and internally, with bristles, or setae, present on each segment. They are found globally, with their …

Below is a brief survey of the internal and external anatomy of the earthworm. For more detailed dissection instructions and information, check out Carolina® Dissection Kits.

Answer key to the dissection of the earthworm, includes labeled images and answers to analysis questions.

HST's Earthworm Dissection Guide for middle schoolers describes the external and internal earthworm anatomy, along with full size PDFs. Check it out!