These 10 animal facts will amaze you. A cavity wall consists of two separate walls that have been built closely together with a space in between them. Each of these walls can be constructed of a different type of masonry, such as brick or concrete, or from other materials.
The CPK blood test is a laboratory test that measures creatine phosphokinase (CPK), which is one of the enzymes found in the brain, heart, and skeletal muscles. This is a useful test for helping doctors to diagnose problems such as muscle damage, heart attack, and related conditions. slide 1 of 4.
The CK test may be done to check for muscle injury. It can give an idea of how bad the injury is, when it happened, and whether it is healing. Other blood tests may be needed to find which area has been injured. The test may be done to: 1  Diagnose the cause of chest pain, such as heart muscle damage from a heart attack.