#khionian

Organs are very similar to humans, however, there are a few changes:

Eyes: sideways blinking like a lizard (double eyelids), very good vision in the dark

Ears: entirely internal structure to dissuade problems from pressure, except for decorative webbed spines on the outside. khionians have rather poor hearing above water

Gills and Lungs: can breathe through gills (which connect to the trachea) while underwater, and is the preferred way of breathing. Have small, but functional lungs, making it a bit harder to breathe above water (khionians are used to a lower concentration of oxygen anyway)

Heart: two chambers rather than the human four, leading to a slightly slower heart rate than humans

Stomach: rather than employing stomach acid as humans do, food is broken down into small crystalline structures in the stomach. This causes digestion to be slower and leads to a slow metabolism. (this is also why, when khionians are sick, what comes up looks like glitter - it’s partially crystallized food)

Intestines: no distinction between large and small intestines, shorter length of the digestive tract

Appendixes: two functioning appendixes, rather than the one non-functional human one

Hands and feet:

both are webbed, with feet being more like a frog’s than a humans, with long, bony toes. Fingers are slightly longer.

Other:

Webbed spines on multiple parts of the body, assist with movement through water. tail with webbed spines does the same.