The thing in the chest is a tongue-like organ connected to its mouth, which is also in the chest.
The "heads" in Snaiadi animals contain their genitalia, the "jaws" in these heads evolved from genital sheats. They sometimes play a role in feeding, but act more like a pincer rather than a true mouth.
Whoa man, Snaiad...every time I see it, it leaves me stoked. Hey, actually, I'd like to try and, I dunno, give out a briefing of what my work's like. There aren't any examples in my gallery, but one day, some day, I'll be uploading my own alien concepts, and you can see if they're likeable and nice too! Technically, It's just a planet called Isis with no humans on it-alien animals and ecosystems left to themselves....
You cannot imagine how much I appreciate this illustration. I kept on wondering how the creatures of Snaiad actually work, and to see this is a great help. I am no biologist, but seeing the insides of these creatures goes a long way towards understanding and appreciating how they work.
-why do the claws and beak not take up the whole of their section of the silhouette? -why is the tail shorter on the outline than that on the kahydron page? -why do the fibrous muscles not go all the way into the end of the tale? -what are those little things connected to the "atrium" near the base of the second head? -what are those two small organs underneath the atrium? -is the liver the bright green organ on top of the brown organ? -I can't quite understand the respiratory diagram. -is the blue organ on the nervous system diagram the wormbasket?
Amazing! What I found most interesting was the worm basket organ, the digestive system excreting dry rocks rather than wet, nasty goop (wether as pellets or ropy piles), the young tearing out of the uterus at birth, and the heart being directly connected to the lungs. Very good job!
I must warn you though, the "Life" link dosen't link to the page of clades, but rather, the map page.
I feel bad 'cause alot of my creatures have similar anatomy and organs. Also since you put it in before me, I feel as if I would be copying you. I just wanted to let you know in case I put in any anatomy of my creatures and you see similarities or as if it looks like it distinctly belongs to you. Just wanted to get that off my chest since your art looks so similar to mine. Makes me feel weird.