Answer:
stethoscope is the instrument used to measure heart beat
Answer:
The carbon footprint is a very important means to understand the impact of a person's behavior on global warming. This is why someone who effectively wants to contribute to stopping global warming, at least on an individual scale, needs to measure and keep track of their personal carbon footprint.
Explanation:
Answer:
Body systems are used throughout your body to help you move and to live like the heart for example.
Oh this is easy.
Astronomy is the branch