The Bloodworm - cardiovascular systems

A multiscale approach reveals elaborate circulatory system and intermittent heartbeat in velvet worms (Onychophora)

Circulatory system of earthworm

A multiscale approach reveals elaborate circulatory system and intermittent heartbeat in velvet worms (Onychophora)

Earthworm Circulatory System, Overview, Anatomy & Diagram

A multiscale approach reveals elaborate circulatory system and intermittent heartbeat in velvet worms (Onychophora)

Earthworm_circulation

Bloodworm's way with copper likely provides paradigm for new materials - Innovations Report

PDF) A Review of the “Open” and “Closed” Circulatory Systems: New Terminology for Complex Invertebrate Circulatory Systems in Light of Current Findings

Annelid - Respiratory, Segmented, Setae

Parasites in the cardiovascular system - ScienceDirect

Earth Worm - CARDIOVASCULAR SYSTEMS

Annelida - Circulatory System