Essentials of Anatomy and Physiology

Organization and General Plan of the Body 17

SUMMARY

As you will see, the terminology presented in this
chapter is used throughout the text to describe the
anatomy of organs and the names of their parts. All
organs of the body contribute to homeostasis, the
healthy state of the body that is maintained by con-
stant and appropriate responses to internal and exter-

nal changes. In the chapters that follow, you will find

detailed descriptions of the physiology of each organ

and organ system, and how the metabolism of each is

necessary to homeostasis. We will now return to a

consideration of the structural organization of the

body and to more extensive descriptions of its levels of

organization. The first of these, the chemical level, is

the subject of the next chapter.

A B

Figure 1–7. Areas of the abdomen. (A) Four quadrants. (B) Nine regions.

QUESTION:Are there any organs found in all four abdominal quadrants?