I talked a little bit about it's anatomy before here but besides that, I think it has both an exoskeleton and an endoskeleton. Pretty much everything that is on the back is hard shell and everything on the front (including arms) is soft and has bones inside (at least for now, I'm still fine tuning it's design so it's subject to change).

Like a centipede it's organs are scattered along the body. The usual we share even with insects (brain, heart, gut, etc) and the glands found in centipedes, as well as tracheal lungs (the spiracles in his head are located where his 'nose' is instead of laterally on the other segments of his body) instead of human lungs. He /is/ venomous too, that's how he paralyzes his preys before eating them. He does have a tongue but it's used to move food, he tastes with his antennae :3c

As for... Intimate anatomy, he's got gonopods, which are modified legs (or here, arms) that are used to deliver sperm into the female. They are much more on the insectoid side, as the arms at the end of his body tend to look. They won't feature a lot in the comic because why use your dick-like appendage when you got so many hands to finger with ? ( ͡° ͜ʖ ͡°)

Hope this satisfies your curiosity ! It's fun to think about monster anatomy :3c