Earth's Atmospheric Layers. Diagram of the layers within Earth's atmosphere. Troposphere. The troposphere starts at the Earth's surface and extends 8 to 14.5 kilometers high (5 to 9 miles). This part of the atmosphere is the most dense. Almost all weather is in this region.Stratosphere. The stratosphere starts just above the troposphere and extends to 50 kilometers (31 miles) high.he troposphere starts at the Earth's surface and extends 8 to 14.5 kilometers high (5 to 9 miles). This part of the atmosphere is the most dense. Almost all weather is in this region.
A bruise, or contusion, is a type of hematoma of tissue in which capillaries and sometimes venules are damaged by trauma, allowing blood to seep, hemorrhage, or extravasate into the surrounding interstitial tissues.
Symptoms of a contusion are often nonspecific, and the diagnosis is one of exclusion. 1  Contusion symptoms include soreness, pain with active range of motion (AROM) and passive range of motion (PROM), as well as limited range of motion (ROM). Without a straightforward history of an impact to the area, the diagnosis can be difficult.