Answer:
P wave
Explanation:
Electrocardiogram records the strength and timing of electrical activity in heart. As various regions of heart contract at different times and for different duration, the electrical activity is not constant and shows a series of rise and fall. There are three main components of ECG: P wave, QRS complex and T wave.
P wave indicates the beginning of electrical signal in the right atrium. The signal spreads in both right and left atria which leads to their contraction. As a result, blood is pumped into the ventricles and rest of the process occurs.
Because the rib muscles and diaphragm contract,increasing the lung volume
The red blood cels becaus ethey transport everything in the body\
Answer:
Limit your night driving, limit your passengers, Get as much supervised practice driving as possible, and always use your seatbelt.
Explanation:
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