i dont know either
The plural form of retina is retinas. As in "your retinas are healthy".
There are many different outgrowths that can be found on animals skin. You can find fur, scales, claws, antlers, and needles for example.
Bone depressions
They have more rod cells.
Chivalry was an outgrowth of the feudal system
you go blind
Retinas, kidneys, spleen
yes.
through their retinas because like us the have retinas which allows them to see but unlike humans the can see in real time and in slow motion.
binary fusion
Birds.
they are outgrowths of endodermal cells or "a" if you use e2020 (Edgenuity)