Selection of sensors

Hey guys. I am designing a prototype using arduino for a medical device and I need the following sensors.
1: body temperature
2: ECG sensor
3: glucose sensor
4: blood pressure sensor

If anyone of you has knowledge which sensor/circuitry/module should be used, I would appreciate it.

Regards,

Number 3 is singularly proprietary!

Do you mean NIBP or connected to a cannula? The latter devices are again, proprietary (even if they are only strain gauges). I haven't come across any unused discards, so have no opportunity to check them out.

Google for "Arduino medical sensors"

Yes I want all the sensors to be non invasive.