What is the only animal that can turn its stomach inside out?
489853
Starfish prolapse their "stomach" inserting it into the shells of their favorite food, clams/mussels.  This way the starfish can digest/ingest the meat while the prey is still inside the shell.  \nSome sea cucumbers expel their stomach and other inner organs (which are easily regenerated) when being attacked.  The hope is the predator will be distrated by the insides and the sea cucumber can get away.
582511
Yes, all birds have gizzards. In most birds the food passes rapidly through the glandular stomach (proventriculus) and stays for some time in the muscular stomach (gizzard) while the gastric secretions (pepsin, HCl and mucus) are at work. In most species the gizzard is complex and has two pairs of opposing muscles. However, birds of prey and Ciconiiformes have a simpler muscular stomach. Also, some birds have a third chamber below the muscular stomach (pyloric stomach), for instance many aquatic species. \n\nCheck this 1997 paper about the gastrointestinal physiology and nutrition of wild birds, it has drawings of the digestive tract of different species (free access):\nhttp://docstore.ingenta.com/cgi-bin/ds_deliver/1/u/d/ISIS/29326609.1/cabi/pns/1997/00000056/00000003/art00028/B9A3D9F840D5656211481333362A0ED16C47E714CF.pdf?link=http://www.ingentaconnect.com/error/delivery&format=pdf )\nIf the link doesn't work, download from here: http://www.ingentaconnect.com/content/cabi/pns/1997/00000056/00000003/art00028\n\nOther references:\nSeasonal changes in gizzard size:\nhttp://elibrary.unm.edu/sora/Condor/files/issues/v092n03/p0794-p0795.pdf\nLess muscular gizzard in birds that eat pollen and nectar (abstract only):\nhttp://www.publish.csiro.au/nid/90/paper/ZO9900581.htm
13523
Rabbit.  Also the most digestable.  You didn't say, but fish is considered a meat also.  In that case, scallops and lobster are lower than anything with legs on them.  Bon Appetite.
627157
In most animals, the main job of the stomach is to break down large fat molecules into smaller ones, so that they can be absorbed into the intestines more easily.\n\n1. The frog has feeble, practically useless teeth unlike humans who use their teeth for mastication in digestion.\n\n2. Solid wastes from the frog's large intestine pass into the cloaca where both liquid and solid waste material leave the body by way of the cloaca and the cloacal vent.In humans liquid waste leave the body by way of the urethra. while solid waste leaves the body by way of the rectum through the anus.
147871
>>>>>(IT IS NOT HOMEWORK! i am competing with a friend for the >>>>> best example)\n\nAnd cheating by asking strangers on the internet. I like the way you think.\n\nThe most extreme example of bacterial endosymbiosis amongst mammals is without a doubt the presence of mitochondria. You might not relaise it but mitochondria are stable line bacterial endosymbionts, complete with there own genetic structure. It's hard to top that.\n\nAfter that probably comes the entire rumen structure of ruminants. Its incredibly cmmplicated, but basically the stomach of cows and sheep is one massive bacterial fermentor. The cow eats grass but is totally unable to digest it. Instead it grinds the grass up fine and swallow sit to wet it. It leave sit in the stomach to fermenta while then brings it up to shew again after the bacteria have softened it. The food then goes back down for even more fermentation in the other three chambers of the stomach. To add to the elegance of this system cows don't just excrete their urea through their kidneys like other mammals. Urea is  a waste in mammals and is poisonous, but it is also a good fertiliser. Ruminants excrete their urea through their salivary glands. It then passes into the stomach and what was a poison to the cow becomes fertiliser for the bacetria, who convert the waste urea into protein that the cow can use. As a reuslt ruminants are the only mammals in the world tht can survive with no protein input intheir deit at all. Which explains why they have been so extraordinarily successful at surviving in harsh and low nutrient environments.\n\nLast comes the biosynthesis of vitamins. Mammals can't   make their own vitamins, they normally need to take it in on the food. However numerous mammals species from dogs to horses are able to harvest those vitamins from bacteria that grow in their guts. So although a dog lives on a diet that is horrendously deficient in 3 or four vitamins it never gets ill or needs to take vitamin tablets. Which is pretty clever.
352430
The spiral shell allows the animal inside to grow.  As it grows, the sheel develops a wider turn at the open end and the animal grows into this space.
376409
It is a mollusk that can partly come out of its body. It has mouth and other feeding organs with the help of which it can feed.
1080700
No penalty burrowing animal
48558
fly's (throw up) on the food they are about to eat. they secrete stomach fluids onto their food so it starts digesting it and then they slurp the digested food and stomach fluids up! yummy.
1064877
no squirls can't fart\n\n^^ true fact look it up
213440
if you mean #2, try Activia. It's sold in dairy section next to yogurt. It's like yogurt, but has alive bacterias that make your stomach work.
1186515
escargot?  no silly it was Gary...meow, also residing in the tasty fruit... the best bubble blowing, jelly fishing, fry cook in bikini bottom... thought everyone knew that
79147
what a strange question... i dunno.. the only one i can think of are kangaroos and i love those!
1128562
No, only mammals (with the exception of monotremes) have nipples. Chicken "breasts" are their huge pectoral muscles. \nI hope you're on the winning side :-)
331815
A camel... but without the humps :)
332706
Nudibranch.  So I could barf my intestines all over unsuspecting bystanders
728227
All animals move at some point in their life.  However, animals like sponges, hydras, anemones and coral are stationary in their adult form.