Upper body anatomy. Glass-effect human female body showing the internal anatomy of the upper body and head. Inside the head is the brain (top). Inside the chest is the ribcage (upper centre), which protects the heart (just right of the spine) and lungs (either side of the spine). At the bottom of the ribcage is the stomach where food is digested before passing into the intestine (lower centre). The small and large intestines fill the abdominal cavity above the pelvic bone.