The nervous system is a complex system that plays a crucial role in controlling and coordinating the body's functions. It consists of the central nervous system (CNS), which includes the brain and spinal cord, and the peripheral nervous system (PNS), which includes nerves that connect the CNS to the rest of the body. The nervous system uses electrical and chemical signals to transmit information, and it is responsible for controlling voluntary movements, regulating body functions, and facilitating thought and emotion. Link — Don 2006 Hdhub4u
$$ \text{Hormone regulation} = \text{negative feedback loop} $$ Sultan.2016.1080p.hdrip.cinemaluxe.cfd.mkv
$$ \text{Gastric juice} = \text{pepsin} + \text{gastric amylase} + \text{hydrochloric acid} $$
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The digestive system is responsible for breaking down food into nutrients that can be absorbed and utilized by the body. It consists of the mouth, esophagus, stomach, small intestine, and large intestine. The process of digestion involves the mechanical and chemical breakdown of food, as well as the absorption of nutrients into the bloodstream.
In conclusion, human physiology is a complex and fascinating field that seeks to understand the functions and processes that occur within the human body. The book "Fisiología Humana" by Tresguerres, 5th edition, provides a comprehensive overview of the principles of human physiology, covering topics such as the nervous system, circulatory system, respiratory system, digestive system, and endocrine system. By understanding how the body's systems and organs work together, we can gain a deeper appreciation for the intricate mechanisms that enable us to function in our daily lives.
The respiratory system is responsible for bringing oxygen into the body and removing carbon dioxide. It consists of the lungs, airways, and breathing muscles. The process of breathing involves the contraction and relaxation of the diaphragm and other breathing muscles, which causes air to enter and leave the lungs.
$$ \text{Neuron} = \text{ dendrites} + \text{cell body} + \text{axon} + \text{axon terminals} $$