Digestive- the way the body converts food into nutrients for the body. Humans - 6 main parts of digestion in mammals- The humans first...

Nervous System Mollusk Scallops- 3 nervous centers, no brain, they contain sensory cells, but no sensory organs. Slugs- contain sensory...

Echinoderms- Just like their respiratory system, they have a simple excretory system. Their Excretory system has no kidneys and use...

Annelids- have a "body wall" with long circular mucsles. They usually have bristles on their muscles segaments called (satae) that help...

Reptiles- all reptiles have a set of lungs, and none of the reptiles go through an aquatic larva stage. Although most reptiles only have...

-Mollusk- Most have a open circulatory system. Cephalopods have a closed circulatory system. Within a open circulatory system blood is...

-Mollusk- One of the few phylum that have a system instead of a few organs that regulate the endocrine system. Octopus- the optic gland...

Arthopods- The Arthopods skele Amphibians- The Amphibians skeleton is a Unossified, or flexible, skeleton. These kinds of skeletons have...