Hello Mohammad,
Thanks for looking into E2E for product recommendations. TMP112 is perfectly suited for body temperature measurement within 0.5degC. Its one of the most widely used parts in the industry, specifically designed to cater health & fitness markets.
If you are looking for a contactless temperature sensor I would also look into TMP007, while obtaining accuracy <1degC is possible with TMP007, obtaining accuracies <0.5degC may require calibration of individual units.
For more information of Blood pressure sensors and ECG sensors please look into the following application diagrams, they will take you directly to the part numbers once you click on the appropriate application block.
http://www.ti.com/solution/blood_pressure_monitor
http://www.ti.com/solution/ecg_electrocardiogram
Hope this helps!
Best Regards,
Abhi