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Medical Physiology - Functional Organization of the Human Body and Regulation of the Internal Environment
The objective of physiology is to comprehend the functions of living organisms and their components. Human physiology encompasses the attributes of the human body that facilitate environmental perception, locomotion, cognition, communication, reproduction, and the execution of all processes essential for survival and flourishing as living organisms.
Human physiology encompasses the functioning of molecules and subcellular components, tissues, organs, organ systems—such as the cardiovascular system—and the interactions and communications among these elements. A defining characteristic of physiology is its aim to unify the functions of all bodily components to comprehend the operation of the entire human organism. Human life depends on this comprehensive function, which is significantly more intricate than the mere aggregation of the functions of individual cells, tissues, and organs. Cells constitute the fundamental living units of the body.
Each organ comprises a collection of many cells interconnected by intercellular supportive structures. The human body comprises between 75 to 100 trillion cells, each specialized for distinct purposes. The functions of individual cells are regulated by several systems that operate inside cells, tissues, organs, and organ systems. Despite the many functions of various cells in the body, they all have fundamental traits. For instance, oxygen interacts with the metabolic byproducts of fats, carbohydrates, or proteins to liberate energy essential for cellular function; (2) the majority of cells possess the capacity for replication, and when cells are damaged, the surviving cells frequently generate new cells until the requisite quantity is reinstated; and cells are immersed in extracellular fluid, the components of which are meticulously regulated.
The objective of physiology is to comprehend the functions of living organisms and their components. Human physiology encompasses the attributes of the human body that facilitate environmental perception, locomotion, cognition, communication, reproduction, and the execution of all processes essential for survival and flourishing as living organisms.
Human physiology encompasses the functioning of molecules and subcellular components, tissues, organs, organ systems—such as the cardiovascular system—and the interactions and communications among these elements. A defining characteristic of physiology is its aim to unify the functions of all bodily components to comprehend the operation of the entire human organism. Human life depends on this comprehensive function, which is significantly more intricate than the mere aggregation of the functions of individual cells, tissues, and organs. Cells constitute the fundamental living units of the body.
Each organ comprises a collection of many cells interconnected by intercellular supportive structures. The human body comprises between 75 to 100 trillion cells, each specialized for distinct purposes. The functions of individual cells are regulated by several systems that operate inside cells, tissues, organs, and organ systems. Despite the many functions of various cells in the body, they all have fundamental traits. For instance, oxygen interacts with the metabolic byproducts of fats, carbohydrates, or proteins to liberate energy essential for cellular function; (2) the majority of cells possess the capacity for replication, and when cells are damaged, the surviving cells frequently generate new cells until the requisite quantity is reinstated; and cells are immersed in extracellular fluid, the components of which are meticulously regulated.
