Health

Seven things you might not know about blood

Blood is fascinating. Many people learn at school that its function is to transport oxygen and nutrients around the body and remove waste products. But blood has many more functions, including defence against pathogens, regulating ...

Diseases, Conditions, Syndromes

Lung injury in COVID-19 is not high altitude pulmonary edema

A group of researchers with experience in treating high altitude pulmonary edema (HAPE) have written to correct the misconception in medical social media forums and elsewhere that the lung injury seen in COVID-19 is not like ...

Diseases, Conditions, Syndromes

Strokes on a plane? On-board facial paralysis wasn't what it seemed

Alan J. Hunter from Oregon Health & Science University was a passenger on a recent airline flight when he responded to a flight attendant's request for a "doctor on board." The flight attendant suspected that a young male ...

Neuroscience

Study examines how high altitude affects memory

Oxygen is essential for maintaining normal human brain function, and living at high altitudes can lead to deficits in cognition such as attention and memory.

Oncology & Cancer

Do you need to wear sunscreen while skiing or snowboarding?

Yes, you definitely do. While the cold winter months may not immediately bring to mind warmth and sunshine, ultraviolet (UV) rays still pose a risk and you need to apply sunscreen before heading outdoors, just like in the ...

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Altitude

Altitude or height is defined based on the context in which it is used (aviation, geometry, geographical survey, sport, and more). As a general definition, altitude is a distance measurement, usually in the vertical or "up" direction, between a reference datum and a point or object. The reference datum also often varies according to the context. Although the term altitude is commonly used to mean the height above sea level of a location, in geography the term elevation is often preferred for this usage.

Vertical distance measurements in the "down" direction are commonly referred to as depth.

This text uses material from Wikipedia, licensed under CC BY-SA