(predators, filter feeders, decomposers) Food passes through digestive system where nutrients are absorbed.Įarthworms & Leeches are hermaphrodites (don’t self fertilize) When 2 mate they exchange sperm. This is why their skin is moist and they live in moist environments Nutrition – Variety of feeding methods.

Respiration – Annelids exchange gases through their skin. Nearly every segment in Annelids has 2 nephridia that collect waste and transports it out of the bodyĨ Annelid Regulation Annelids have a nervous system that consists of nerve fibers in each segment connected by ventral nerve cords to a simple brain near the mouth Nervous system is used to sense the environment. Blood is pumped to head & body transporting oxygen and carbon dioxide Have “hearts” that pump blood, really enlarged, muscular blood vesselsħ Annelid Excretion Annelids have a complete digestive system (contains both a mouth and anus) Food is absorbed in the intestine. We are going to focus on the Annelids and Insects (a class of Arthropods)ģ Annelids Segmented Worms – each segment is a septa, have head & body segments Closed Circulatory System: Blood moves through vessels Consists of Earthworms (oligochaeta), Leeches (hirudinea) and marine worms (polychaeta)ĥ Annelid Transport Annelids have a closed circulatory system – blood moves through vessels.

Notes: Invertebrates - Annelid Worms - InsectsĢ Invertebrates Animals that lack a backbone

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