Science Buddies: "Ask an Expert"

Hi,

I am doing a science project to make a semi-artificial body. I found a lot of issues in my project and fixed them. But I'm not sure if there are more issues I couldn't find (and I also don't know if it's possible!). Can anyone help me identify issues in my project, or else a person will die.

Topic: Semi-Artificial Body

Things being added at surgery: 

2 Stm32 nucleo boards
Fresenius 4008s blood pump
2 batteries
Wires, tubes, ...
Water Sensor
Usb-in cable
Buzzer

Things being removed at surgery:

whole digestive system except the liver
whole respiratory system, whole reproductive system, whole urinary system
The heart (which will be replaced by a Fresenius 4008s blood pump)

---stm--stm
|
(WS) ___|__ (to blood vessels)
| | |
[4008S]--[4008S]
| |
{bat1}--{bat2}