Answer:
Each time your heart beats, an electrical signal travels through the heart. An EKG can show if your heart is beating at a normal rate and strength. It also helps show the size and position of your heart's chambers. An abnormal EKG can be a sign of heart disease or damage.
Plants on Earth provide food, some even provide shelter to some animals, and plants such as trees provide oxygen to the environment.
50%x 4842 because of you in your account number and you are now in 48525