Coronary vessels supply blood to heart muscles ..blockage in them will cause hypoxia in heart muscles which leads to heart attack
Answer:
3
Explanation:
Infrared, is much more different compared to Bluetooth and WiFi. Infrared uses, as the name infers… the infrared spectrum of light. It is basically red light which is not visible to our human eyes. Unlike radio waves, infrared cannot pass through walls and other obstructions, so the applications are usually limited to devices that are within Line-Of-Sight or where light can travel
A. energy, because plants, for example, are organisms which don't require blood. And humans are organisms that don't require soil. But all organisms require some variety of energy in order to live
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