A landmark to look for on the earthworm is its clitellum, something that looks like a band.
No, worms are not external.
diet of worms
hyoid bone
No, worms are not arthropods because they do not have a shell. All arthropods have an external shell or an exoskeleton which is used to define them or classify them.
according to my research earthworms use external fertilization because they receive and store sperm from the other worms in copulation.
Worms are normally not external parasites, but internal parasites. External parasites include different arthropod species like ticks, fleas, lice, mosquitos....
No, glow worms are not vertebrates.Specifically, glow worms belong to the insect class. That means that they have skeletons that are external to their bodies. Vertebrates such as humans have skeletons that are inside their bodies.
It depends on the location of the worms, but in either case you should acquire medication from a veterinarian. Intestinal worms in the stomach, intestines and rectum. External worms, such as under the tail or between the back legs.
Internal parasites in cattle can be worms in the intestinal tract and external ones would be ticks, flies and fleas on their skin.
Ringworm can be treated topically (with external applications) or systemically (for example, with oral medications):
The external landmark on an earthworm is the clitellum, a thickened, glandular band found near the anterior (front) end of the worm. It plays a crucial role in reproduction by secreting a cocoon for eggs during mating. The clitellum is usually more prominent and lighter in color than the surrounding segments, making it easily identifiable. Other external features include segments and setae, small bristle-like structures that aid in movement.
Earwigs do belong to the Phylum of Arthropods. The characteristics of arthropods is an external skeleton, a segmented body, and jointed appendages.