From the digestive system to the reproductive system, and the muscles that help the body function, the anatomy of the chicken is quite unique compared to mammals.
Our group dissected a chicken and labeled the organs of six body systems and the external anatomy:
Muscular System
Reproductive System
Digestive System
Respiratory System
Urogenital System
Circulatory System
Chicken header pic: https://www.livescience.com/64280-chickens-taking-over-world.html