Frontal cross-section of the large intestine (colon) showing internal anatomy.

Cross-section of small synovial joint showing progression of disease of rheumatoid arthritis: step 4.

Cross-section of small synovial joint showing progression of disease of rheumatoid arthritis: step 2.

Cross section of the interior surface of the transverse colon showing the semilunar folds and teniae coli on the smooth-surfaced wall.

Cross section of the interior surface of the ileum, distal part, showing an absence of plicae circulares. Solitary lymph nodules stud the wall.

Orientation drawing of the small intestine shows location of sections.

Deep dissection of abdominal region. Most of small intestine has been removed as well as the mesocolon and peritoneum exposing the underlying psoas muscle and aortic and vena caval bifurcations. Superior gastric plexus is also visible lying on the left

Mucosa of small intestine, cross-section