Octopus

Friends saw the animal octopus called directly? Octopus in the English language is called the octopus moluska animals from the class Cephalopoda (paw is located in the head), ordo Octopoda with coral reefs in the ocean as the main habitat. Octopus consists of 289 species that include a third of the total species of the class Cephalopoda.

Physical form of octopus

Octopus has 8 arms with tools suck a hollow sphere-sphere in the arm that is used to move in the bottom of the seaand catch prey. Octopus arm is hidrostat muskuler structure that is almost entirely comprised of a layer without muscle or skeleton bones outside. Cephalopoda not like other animals, most of the octopus subordo Incirrata have a body that consists of muscles and bones without in order. Octopus does not have a body shell on the outside of the protector as well as the Nautilus, and have not in the body shell or bone, such as cuttlefish and squid. Terkeras is part of the octopus's body is used as jaw to kill prey and menggigitnya into small parts.

Very flexible body that allows the octopus to put themselves on a rock fissure is very narrow at the bottom of the sea, especially during the escape of fish such as pemangsa sea Moray eel. Octopus that are less known people from subordo Cirrata have two fin and in the body shell so that the ability to slip into a narrow room in a decrease.

The octopus has a relatively short life and some species only live for 6 months. Larger species such as the North Pacific giant octopus that the weight can reach 40 kilograms can live up to 5 years under the appropriate environmental conditions. Reproduction is one of the cause of the death, male octopus can only live a few months after marrying and female octopus die die soon after laying. Death due to negligence octopus to eat for about one month while maintaining the egg-hatch eggs that have not.

The stomach body wrap octopus called the mantle made of muscle and look like wings. Octopus has three heart consisting of two heart for pumping blood to the two gill and a heart for pumping blood throughout the body. Blood octopus Hemosianin contain protein that is rich with copper to carry oxygen.

Compared with a hemoglobin that is rich with iron, Hemosianin less efficient in oxygen transport. Hemosianin dissolved in plasma and not bound by red blood cells so that blood pale blue octopus. Octopus with breathing siphon water into the mantle cavity through the second gill disemburkan and out through the siphon tube. Gill with the octopus has a very fine division, growth came from the outside of the body or part in the vaskulerisasi.

Intelligent animals

Octopus is very intelligent animals and are likely among the most intelligent of all invertebrates animals. Octopus ingenuity often become the subject of debate among experts in biology. Explore the way the results of an experiment in maze and solve the problem indicates that the octopus have a short-term memory and long-term memory, even though the short live octopus that makes knowledge octopus can learn to be limited. Octopus nervous system has a very complex, with some sort of terlokalisir in the brain. Two-thirds of the nerve cells found in the nerve cords in the eight-arm octopus.

Octopus arm can perform a wide variety of complex reflex movement, triggered by 3 stages of the nervous system is different. Some types, such as octopus octopus can mimic the arm-lengannya to mimic the movement of other sea animals. In the experiment in the laboratory, octopus can be easily taught to distinguish the various forms and patterns. Octopus can open a close study of the toples see it, even though the invention of this dipertentangkan often based on a variety of reasons.

Octopus ever found are doing the movement that, according to some people as being in play. In many times, octopus throw bottles and toys in the middle of the circular flow of water in the aquarium and then try to catch it. Octopus often solve the aquarium ditinggalinya and sometimes to visit another aquarium to find food. Also known octopus often swarm hooker and open storage space for fish feed crabs.

In some countries, including octopus animal experiments that may not be operated without anesthesia. In the United Kingdom, Cephalopoda, including animals such as octopus protected Animals (Scientific Procedures) Act 1986 and the laws against anti-animal cruelty. Although no vertebrate, octopus animal experiment as to the protection of animals, as well as any other vertebrate.