Snail 12345


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Snail 12345

  1. 1. Snails November 16, 2009 Volume VII Transportation Inside and Through the breathing Out holes (aka pneumostome) oxygen reaches the snails Inside: lungs. The inside blood circulation system of a Outside: snail is vein less. It is A snail moves by sliding open with blood spaces. on mucus that is produced Haemocyanin is a colorless from a foot which is found pigment which contains under the body of a snail. copper. A snail’s heart is The muscles in the foot relatively weak. It contract and expand which consists of a single thick creates a kind of rippling walled ventricle and a movement which pushes the single thin walled snail forward. The auricle. The blood takes movement with the mucus the oxygen from the lungs makes a sliding track so and spreads it to the the snail can move faster. auricle and the ventricle. The mucus leaves behind a The ventricle releases the silvery blood with oxygen into the arteries, and after that to the tissues. The tissues take oxygen and food and excrete waste products. Then the blood flows back to the heart using blood spaces. On the inside of the visceral-sac lays the lung (aka pulmonary cavity). 1
  2. 2. track which move on sharp objects with can out getting hurt. sometimes be found in Extinct or Endangered gardens. Molluscs Asia The slime * Gastrocopta chichijimana comes out (Terrestrial snail from Japan) of the front of the foot * Gastrocopta ogasawarana and when it comes in (Terrestrial snail from Japan) contact with air it * Hirasea planulata hardens. The mucus is so (Terrestrial snail from Japan) tough that a snail can * Lamellid monodonta spiritus Land Megalobulimus (Terrestrial snail snail, Recent cardosoi from Japan) * Placostylus (Terrestrial snail * Lamellidea ambagiosus worthyi from Brazil) nakadai Zealand Land snail, Recent Extinct: 50 species * Placostylus Molluscs South ambagiosus America Extinct in the gardneri Land Wild: 11 species, snail, Recent * Littoridina including Partula * Placostylus gaudichaudii dentifera, Partula ambagiosus hinemoa (Freshwater snail faba, Partula Land snail, Recent from Ecuador) garretti, Partula * Placostylus * Tomigerus hebe, Partula ambagiosus gibberulus labrusca, Partula lesleyae Land (Terrestrial snail mirabilis, Partula snail, Recent from Brazil) mooreana, Partula * Placostylus * Tomigerus suturalis, Partula ambagiosus priscus turbinatus tohiveana, Partula Land snail, Recent (Terrestrial snail tristis * Placostylus from Brazil) ambagiosus * 2
  3. 3. Critically the giant appreciable Endangered: 18 African snail. amounts of heat species, including internally. In Partula calypso, Partula clara, desert Partula emersoni, Over Time conditions and Partula filosa, full sun, they Partula gibba, Over time the can survive Partula guamensis, Gastropods tens of degrees Partula hyalina, first appeared hotter than the Partula langfordi, in the second air but will Partula leucothoe, Partula half of the not survive for martensiana, Dolgellian Age. long. Partula They evolved in A body of a otaheitana, through out snail consists Partula radiolata, history since of the snails Partula rosea, then. A snail head, neck, Partula thetis, all through visceral hump, Partula varia history has tail, and foot. Endangered: 7 been at the On the head is species bottom of the two pairs of food chain. tentacles. Some of its There are a predators large pair on Symmetry and include ground top of it’s Others beetles, head, which is snakes, toads, where the eyes The symmetry of turtles, and are, and the the snail is birds (like lower pair of bilateral. If chickens, tentacles on the snail had ducks, and the lower part the shell on geese). Another of the head. A then it would predator would snails mouth is be asymmetry. be a predatory under the lower Other organisms caterpillar! tentacles. The in the visceral hump, Gastropod group Regulation and which contains would be the General the internal slug. A couple Structure organs, is of odd snails found in the would be the Snails are cold shell. apple snail and blooded and do not generate 3
  4. 4. The visceral is one of the hump, which reasons farmers contains the and people get internal upset. organs, is found in the shell. The foot is under the Reproduction mantle and holds the Snails sexually muscles for the reproduce. You snail to move. can not tell a male or a female snail What’s For apart by the Dinner? color or shape of the shell. Most land But in some snails eat cases you can plant and other tell the vegetation. difference by Snails eat the size of the decaying and shell. living plants. They also eat fruits, plant bark, and algae. A snail has a radula in its mouth for grinding up its food. A radula is like a rough tongue, like a file with rows of small teeth. It scrapes off leaves and flowers to eat. Snails can also gnaw through limestone. That 4