Leech. Hirudineans. Annelids. Invertebrates. Animal Kingdom. Wildlife. Fauna. Zoology.

Hirudíneos or leeches are annelid or ringed worms that lack silks or parapods, with the body formed by 33 segments or rings, but internally they do not present dividing walls.

There are about 300 species among which there are some marine and terrestrial.
Most are small and harmless.

They generally live in fresh waters.

They can be external parasites of mollusks or vertebrates.

The most notable feature is the presence of an oral suction cup and a posterior and anal one.
In the front part is the mouth armed with teeth that it uses to cut the skin of the victims, with whose blood they feed, sucked with a powerful pharynx and the suction cup.
Between the teeth they have glands that secrete hirudin, which prevents blood clotting.
The digestive tract has numerous cecum where they store blood for a long time.

Medicinal Leech: Hementera costata

In the past, live leeches were used to bleed and remove the blood that was believed to be "rotten" from the body of the sick.
Locomotion of a leech.

Reproduction

Leeches are hermaphrodites.



Other information about fauna in Aragón:

A small list of species in Aragon would be the following:

Vertebrates	Invertebrates
Mammals Red squirrel. Bear. Fox. Artiodactyl Ungulates Deer. Wild pig. Birds Classification of Birds Storks. Capercaillies. Reptiles Amphibians Urodelos.    Marbled Triton.    Webbed Triton.    Pyrenean triton. Anurans. Fishes	Metazoans Arthropods Myriapods Insects Arachnids Spiders Crustaceans Annelids Worm Molluscs Asquelmintos Platelmintos Celentereos Porifera Protozoa
images about the fauna in Aragon.    photographs on invertebrates.    beneficial animals for agriculture.

Also Aragon enjoys a diverse and varied Nature where passing by plants, animals, Geology, or landscapes we can arrive at a fantastic bestiary that lives in its monuments.

The information will not be complete without a stroll by its three provinces, with shutdown in some of its spectacular landscapes like Ordesa, the Moncayo, Monegros or by opposition the Ebro.

Also you can dedicarte to the intangible ones: from the legend compilation that also does to universal Aragon.