What are the Acorn worms?

Acorn worms are a type of invertebrate, which lives in the burrows on the coast or shallow waters. The name of the worm comes from the sigment in the shape of the acorn on the front of the body. There are nearly 100 types of worms, in the range of 1 / _{25 thumb up to almost 8 feet long (1 millimeter to 2.5 meters). Worms eat material that can be found in the sand in which they create their burrows or float freely in the water around them. They are very closely linked to another classes of sea creatures, which include sea stars and depict a conventional line based on their distinctive anatomical features. The anatomy of the worms led to the scientists to study them as one of the connecting species between vertebrates and invertebrates. Their bodies are arranged. Their bodies have three sections, starting with an acorn -shaped area on the front of the worm. This acorn is an organ used to help the worm to the ground into the ground and to help attract food to the body to be processed.}

The second part of the body is called the collar and helps sit in the acorn organ. The last area is known as a suitcase. The whole body is covered with small hairs known as cilia. Worms use these hairs to help them move, hope and direct food to their mouths. As the worms grow, the worms constantly develop bulb slots in two lines along the length of their bodies; They are mainly used for breathing.

internally, the worms of the acorn have two hollow nerve cords. These nerve cords suggest that the worms are related to ancient vertebrates. Their development of slot Gill means that it is also related to the class of animals known as chords. This combination of ancestors is studied because it could mean that the worms are a link between these two types of animals.

Acorn Worms spends almost their entire time in Norwegians or under other protective structures such as rocks, so people in the wild have almost never seen them. Instead, evidence of worms can be found in their castings. WormsThey increase the end of their bodies from their burrows and release a long chain of fissioned sand, minerals and other excrements. These castings form ribbons that remain at the bottom of the water around their burrow.