If in the prescription written
for a 2-year-old child for an isotonic enema, the amount of fluid to be
administered is not precisely specified by the healthcare provider, the maximal
amount of fluid the nurse should administer to the child is 255 to 360 mL
When the organism become bipedal, they walk with 2 legs so there are 2 arms that were unused. Some of them try to use that hand by grabbing stick or stone, leading to tools. They start to think more to develop tools and their brain capacity become increased.
The ability to use stone tools will help in food digestion since it can break the food easier. This reduces the needs for bigger teeth/jaw.
I pretty sure it's the uterus