This document provides an overview of anatomy and physiology as it relates to dogs and pigs. It defines anatomy as the study of living structures and physiology as the study of functions. The document reviews the four basic tissue types - epithelium, connective, muscular, and nervous tissues. It also outlines some key internal structures like the eye, nasal cavity, brain, lungs, heart, stomach, intestines and others. Finally, it briefly introduces different fields of anatomy like surface, applied, surgical and radiological anatomy.