Question

1. one contraction and one relaxation of atria and ventricles is called ______________ . 2. The device which used to measure the blood pressure is _______. 3. The normal range of blood pressure is_____________.
4. ________ Discovered the first stethoscope.​

Answer 1

Normal range of blood is 7.4

the discover of first stethoscope is Rene Theophile Hyacinthe Laennec

Answer 2

Answer:

1. Cardiac Cycle

2.Sphygmomanometers

3.less than 120/80 mmHg

(healthy range)

4.René Laennec