Chapter 1
Introduction to the Human Body
![Overview of Anatomy and Physiology](https://jovecdn2.ccindex.cn/files/media/science-education/science-education-thumbs/13847.jpg)
Human anatomy is the scientific study of the body's structures. Some of these structures are very small and can only be observed and analyzed…
![Structural Organization of the Human Body: An Overview](https://jovecdn2.ccindex.cn/files/media/science-education/science-education-thumbs/13848.jpg)
It is convenient to consider the body's structures in terms of fundamental levels of organization that increase in complexity: subatomic…
![Requirements for Human Life](https://jovecdn2.ccindex.cn/files/media/science-education/science-education-thumbs/13850.jpg)
The Earth and its atmosphere have provided humans with air, water, and food, but these are not the only requirements for survival. Humans also…
![What is Homeostasis?](https://jovecdn2.ccindex.cn/files/media/science-education/science-education-thumbs/13851.jpg)
Maintaining homeostasis requires that the body continuously maintain its internal conditions. Each physiological condition has a particular set…
![Homeostatic Imbalance](https://jovecdn2.ccindex.cn/files/media/science-education/science-education-thumbs/13853.jpg)
Homeostasis is the maintenance of a stable internal environment within the body, which is crucial for the proper functioning of cells, tissues,…
![Anatomical Terminology](https://jovecdn2.ccindex.cn/files/media/science-education/science-education-thumbs/13854.jpg)
Knowledge of anatomy is essential to understand human biology and medicine. Anatomists and health care professionals use standard terminology to…
![Regional Terms](https://jovecdn2.ccindex.cn/files/media/science-education/science-education-thumbs/13856.jpg)
Regional terms describe anatomy by dividing the body parts into different regions that contain structures involved in contributing similar functions.…
![Directional Terms](https://jovecdn2.ccindex.cn/files/media/science-education/science-education-thumbs/13857.jpg)
Directional terms are essential for describing the relative locations of different body structures. For instance, an anatomist might describe one…
![Whole Body and Regional Quantification of Active Human Brown Adipose Tissue Using <sup>18</sup>F-FDG PET/CT](https://jovecdn2.ccindex.cn/files/thumbs/58469_t.png)
Whole Body and Regional Quantification of Active Human Brown Adipose Tissue Using 18F-FDG PET/CT
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In endothermic animals, brown adipose tissue (BAT) is activated to produce heat for defending body temperature in response to cold. BAT's ability…
![Frame-by-Frame Video Analysis of Idiosyncratic Reach-to-Grasp Movements in Humans](https://jovecdn2.ccindex.cn/files/thumbs/56733_t.png)
Prehension, the act of reaching to grasp an object, is central to the human experience. We use it to feed ourselves, groom ourselves, and manipulate…