Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Cell theory wikipedia , lookup
Organ-on-a-chip wikipedia , lookup
Developmental biology wikipedia , lookup
Human genetic resistance to malaria wikipedia , lookup
Adoptive cell transfer wikipedia , lookup
Homeostasis wikipedia , lookup
Hematopoietic stem cell wikipedia , lookup
Regeneration in humans wikipedia , lookup
122 Oceans Sciences Squids are generally found all over the world. A great number of them are located in the pacific ocean. Squids are great examples of cephalopods, where their heads, tentacles and eyes are developed. They also have eight short arms, near their mouth and small fins near the ends of their tails. Many of these creatures have special pigment cells called chromatophores in their skin. By controlling the size of the cells they can vary their color and even create changing patterns. Chromatophores are connected to the nervous system, and their size is determined by muscular contractions. With a closed circulatory system, the squid has two branchial hearts. These two hearts are located at the base of the gills which send unoxygenated blood through the gills. The third ventricular heart then pumps this oxygenated blood throughout the body. Squids are quite shy creatures, and tend to live in deep waters ranging from 1000 to 2000 ft. Squid eat fish, crustaceans for instance, shrimp, and other squid. Squids have a tongue, which is known as the Radula. Most squid have a sac containing spermatophores that it places in the mantle of the female squid where the sperm is released into the mantle cavity. When food is taken up by cells lining the digestive glands arising from the stomach, and then is passed into the blood. Undigested materials are compressed and packaged, then discharged through the anus into the mantle cavity and are carried away in the water currents. http://www.buzzle.com/articles/squids-habitat.html http://tolweb.org/treehouses/?treehouse_id=4225