Muscle stiffness is a condition in which muscles feel tight and contracted rather than the usual supple state of muscles at rest.Itâs also called stiff muscles, rigidity, and in severe cases, spasticity. Muscle stiffness is a feeling of tension and contraction in the muscles.uscle stiffness is a condition in which muscles feel tight and contracted rather than the usual supple state of muscles at rest.
Making the world better, one answer at a time. Using the definition of organ as a group of cells that perform a specific function, the average human body has 78 organs. There are approximately 78 organs in the body. Using the definition of organ as a group of cells that perform a specific function, the average human body has 78 organs.
An organ is a group of different kinds of tissues working together to perform a particular activity. The heart is an organ composed of muscle, nervous, connective, and epithelial tissues. An organ system is two or more organs working together to accomplish a particular task. The digestive system, for example, involves the coordinated activities of many organs, including the mouth, stomach, small and large intestines, pancreas, and liver.