Homeostasis is the capacity of a system (open or closed) to maintain its balance operating within the constraints that are external. In terms of the human physiology, homeostasis is the dynamic equilibrium that keeps us alive (Mayo Clinic, 2010). It is the maintenance of all physical and chemical parameters of the body that should remain relatively constant (blood glucose, temperature, salt levels in the blood, etc.). Moreover, the fixity of the internal environment is the condition of a free and independent life: that is to say that we do not have to worry about the environment for change. Thus, with respect to the homeostatic system of the human body, it can be understood that the blood pressure of the couple decreased after they entered the hot tub. Now, the homeostatic system has its limits and can function properly only within a certain range of temperatures. Beyond this range, the temperature can be extreme for the human body and the homeostatic system will fail to adjust the blood pressure to help the body function properly. This will result in the failure of the functioning of different parts of the human body like the pulmonary system, the circulatory system, the kidneys, etc. The heat in the hot tub causes the opening of pores of the body and sweating. A huge amount of salt and water get excreated from the body through sweat in order lower the pressure. This causes dehydration and can lead to malfunctioning of different body parts.
平衡是一个系统的容量（打开或关闭）保持平衡的操作在该外部约束。在人体生理学，平衡是动态的平衡，使我们活着（梅奥诊所，2010）。是的，应该保持相对恒定的身体所有的物理和化学参数的维护（血糖，温度，盐在血液中的水平，等。）。此外，内部环境的稳定性是一个自由和独立的生活状态：也就是说，我们不必担心改变环境。因此，对人体的平衡的系统，这是可以理解的，他们进入热水浴缸后夫妻血压下降。现在，稳态系统有其局限，能正常运行，只有在一定温度范围内。超出此范围，将温度极端的对人体和环境系统将无法调整有助于人体正常血压。这将导致在人体的不同部位如肺系统功能失效，循环系统，肾脏，在浴缸里热等原因造成身体的毛孔开放和出汗。盐和水的大量获得通过汗水为excreated降低压力从体内。这会导致脱水，会导致不同的身体部位的故障。
