A contusion occurs when a strong blow or repeated blows from an object struck the body, crushing the underlying muscle fibres and connective tissues without breaking the skin.
A contusion can vary in severity depending on the object and location of the injury. For example a contusion to the brain may cause a concussion that can cause serious symptoms that require immediate medical attention
The ocean is the main regulator of co2 in the atmosphere because co2 can dissolve easily in it
Explanation:
nervous tissue is small unit of nervous system
