Homeostasis or homoeostasis (homeo- + -stasis) is the property of a system in which variables are regulated so that internal conditions remain stable and relatively constant.Examples of homeostasis include the regulation of temperature and the balance between acidity and alkalinity (pH). good example of this is regulating blood pressure. Blood vessels can sense resistance of blood flow against the walls when blood pressure increases. The blood vessels act as the receptors and they relay this message to the brain.
Flexibility is defined as the range of motion of your joints or the ability of your joints to move freely. It also refers to the mobility of your muscles, which allows for more movement around the joints.
Flexibility is the range of motion possible around a specific joint or series of articulations. Flexibility is specific to a given joint or movement. A person may not be able to function normally if a joint lacks normal movement. The ability to move a joint through an adequate range of movement is important for daily activities in general as well a sports performance. For example, a sprinter may be handicapped by tight, inelastic hamstring muscles since the ability to flex the hip joint will be limited, thus shortening stride length.