You Look Like a Sea Cucumber
We share a 450-million-year-old ancestor with sea cucumbers, and the family resemblance is still evident.
Just like us, sea cucumbers have mouths, which they use to consume food. However, sea cucumbers take one step further with tentacles, which can capture the food.
Sea cucumbers have a central nervous system: a ring of nerves around the mouth, and more nerves lead to the rest of the body. These nerves are produced by supporting cells just like in humans.
During the embryonic stage of sea cucumbers and humans, the anus develops first, followed by the bowels and the mouth, as opposed to other creatures such as insects and molluscs. Moreover, some sea cucumbers have gullets and stomachs just like us.
Sea cucumber muscles are simple,but they still consist of both skeletal and smooth musculature just like ours. Sea cucumber muscles let the body can contract and the tentacles can be moved.