Biomes. The two main types of biome are terrestrial (land-based) and aquatic (water-based). The easiest to discuss are the terrestrial biomes since they have a more definite boundary. The different climates of the Earth are governed by their average annual precipitation and temperature.
An electrocardiogram (ECG or EKG) test. An electrocardiogram (ECG or EKG) is a routine test that is used to look at the electrical activity of the heartbeat. An electrocardiogram can tell your doctor a lot about your heart and how it is working.
How to Become an ECG Technician. An electrocardiograph (ECG or EKG) technician is responsible for operating equipment that measures patients' heart activity in order to allow physicians to diagnose and treat problems and diseases of the cardiac and peripheral vascular systems.