The extension in the digestive tract that increases surface area for absorption is the

Earthworms are hermaphrodites. This means they

The clitellum is used in

Respiration (gas exchange) in earthworms occurs through

The thin membranes that separate segments in annelids are called

The distinguishing feature of annelids compared to roundworms is

What type of circulatory system do annelids have?

What are the excretory organs of annelids called?

The bristles on the outside of an annelid that help it move and anchor it in the soil are

The respiratory organs found in aquatic annelids are the

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