Sponges Porifers Invertebrates Animal Kingdom. Wildlife. Fauna. Zoology.

Type of animals that comprise very simple organisms since they lack true organs being considered, therefore, the most primitive multicellular animals.

They are not organized in true tissues and cells are capable of existing independently, and have very remarkable regeneration properties.

The body of the sponges is shaped like a sac with a peduncle to attach to rocks and plants. They consist of an outer and inner layer of cells, among which there is a mass of wandering cells and other spicule producers.

The entire body of the sponge is perforated by an infinity of holes through which the water with food particles penetrates the atrial cavity, which is covered with flagellated cells called co-oocytes, which absorb the food.

Cut of a corneal sponge in which the spicule network is observed.

Sponges are characterized by having a skeleton formed by calcareous spicules, or, more commonly siliceous.
Sometimes they have corneal fibers.
The spicules are very varied and constitute the body of the sponge that is normally used for bathing.

Reproduction

Sponges can produce eggs and sperm at the same time and fertilize themselves. Once fertilization is done, the egg begins to develop inside or mesenchyme. Then, the larva detaches and forms a new sponge. They can also reproduce asexually by budding or bud growth.

Types of sponges

Depending on the situation of the ciliated coocytes, they are classified as: ascon type, sicon type and leucon type.

According to its structure

Porifers are divided into three classes:

• calciosponjas or calcareous sponges;
• demosponjas, with siliceous spicules, and
• hexactinélidas, with siliceous spicules and corneas.

Some species of sponges

• Watering can of the Philippines (Euplectella).
• Bath sponge (Spongia officinalis).
• Axinella.
• Mediterranean Haliclona.
• Sea orange (Tethya).



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.