Annelida
In some annelids, including earthworms, all respiration is via the skin. However, many polychaetes and some clitellates (the group to which earthworms belong) have gills associated with most segments, often as extensions of the parapodia in polychaetes. The gills of tube-dwellers and burrowers usually cluster around whichever end has the stronger water flow.
Nereididae (Ragworm)
Like the Annelida, ragworms their respiration is from the skin.
The blood of annelids contains haemoglobin, the same respiratory pigment as in humans, it is this that makes their blood the same red color as ours.
The blood of annelids contains haemoglobin, the same respiratory pigment as in humans, it is this that makes their blood the same red color as ours.
Blood Worm
The Blood worm and most other parapodia have two finger-like gills where gases are exchanged with their body fluid.
These worms are creamy pink and have minute fleshy projections called parapodia which function during movement and respiration. Their common name "bloodworm" most likely originated from the fact that their red body fluid is visible though their pale translucent skin.
These worms are creamy pink and have minute fleshy projections called parapodia which function during movement and respiration. Their common name "bloodworm" most likely originated from the fact that their red body fluid is visible though their pale translucent skin.