"Apodemes" is a scientific term used to describe a depression or groove in an animal's exoskeleton where muscles attach. Some synonyms for this word include muscle attachment points, tendon attachment sites, or even just attachment points. In biology, these areas are highly important as they are where muscle tension is transferred to create movement in the animal. Without these attachment points, it would be impossible for animals to move in the ways they do. While these synonyms may not be as specific as "apodemes," they serve the same purpose in describing the location where muscles attach to exoskeletons in various creatures.