Answer:
The correct answer is : nervous system.
Explanation:
Irritability is one of the key aspect life which is deal with being able to response or change according to the stimuli that is occur and disturbs the homeostasis of the body which is maintaining the body environment for living.
Nervous system is deal with the irritability by sensing the stimuli in which change occur it can be physical stimuli such as temperature, light, or sound or chemical stimuli such as pH, ions, amount of required chemical or biological stimuli such microbes in body. All these stimuli are sense b the sensory neurons and then send these signals to brain or spinal cord in order t act and respond accordingly to maintain homeostasis.
Thus, the correct answer is : nervous sytem.
The difference in an area with high concentration and an area with low concentration is called concentration gradient.
<h3>What is concentration gradient?</h3>
Concentration gradient refers to the difference between the concentrations of two solutes in a solution.
A solution usually contains an area or region with higher concentration and an area with lower concentration.
The difference between these two areas of different concentrations is referred to as a concentration gradient.
Learn more about concentration gradient at: brainly.com/question/13050811
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Pericardium in the Medical report from Ms. K means fibrous tissue surrounding the heart. The pericardium is the membrane that is enclosing the heart, consisting of an outer fibrous layer and an inner double layer of serous membrane. It is a membrane that surrounds and protects the human heart. It is also a double-walled sac containing the heart and the roots of the vessels. The Pericardial sac has a serious layer and a fibrous layer, total of two layers. This pericardial sac encloses the pericardial cavity which contains pericardial fluid. Pericardium also has a disorders namely Pericarditis, Pericardial effusion, and Cardiac Tamponade.