![This is blank.](https://digitalhistology.org/wp-content/themes/histology-unified/imgs/trans.png)
Recto-anal junctions
These images compare the recto-anal junction (left) with the junction of the anal canal with the anus (right). For the recto-anal junction, the transition from simple columnar epithelium with goblet cells of the rectum to the stratified squamous moist epithelium of the anal canal is abrupt. The junction of the anal canal with the anus, lined by a keratinized stratified squamous epithelium, is a bit more gradual. 400x
![Recto-anal junction <p>These images compare the recto-anal junction (left) with the junction of the anal canal with the anus (right). For the recto-anal junction, the transition from simple columnar epithelium with goblet cells of the rectum to the stratified squamous moist epithelium of the anal canal is abrupt. The junction of the anal canal with the anus, lined by a keratinized stratified squamous epithelium, is a bit more gradual. 400x</p>](https://digitalhistology.org/wp-content/uploads/2017/10/Or.Dig_.Tub_.LgI-12-1-ping.png)
Recto-anal junction
These images compare the recto-anal junction (left) with the junction of the anal canal with the anus (right). For the recto-anal junction, the transition from simple columnar epithelium with goblet cells of the rectum to the stratified squamous moist epithelium of the anal canal is abrupt. The junction of the anal canal with the anus, lined by a keratinized stratified squamous epithelium, is a bit more gradual. 400x
![Region of junction with anus <p>These images compare the recto-anal junction (left) with the junction of the anal canal with the anus (right). For the recto-anal junction, the transition from simple columnar epithelium with goblet cells of the rectum to the stratified squamous moist epithelium of the anal canal is abrupt. The junction of the anal canal with the anus, lined by a keratinized stratified squamous epithelium, is a bit more gradual. 400x</p>](https://digitalhistology.org/wp-content/uploads/2017/10/Or.Dig_.Tub_.LgI-12-2-ping.png)
Region of junction with anus
These images compare the recto-anal junction (left) with the junction of the anal canal with the anus (right). For the recto-anal junction, the transition from simple columnar epithelium with goblet cells of the rectum to the stratified squamous moist epithelium of the anal canal is abrupt. The junction of the anal canal with the anus, lined by a keratinized stratified squamous epithelium, is a bit more gradual. 400x
![Rectum <p>These images compare the recto-anal junction (left) with the junction of the anal canal with the anus (right). For the recto-anal junction, the transition from simple columnar epithelium with goblet cells of the rectum to the stratified squamous moist epithelium of the anal canal is abrupt. The junction of the anal canal with the anus, lined by a keratinized stratified squamous epithelium, is a bit more gradual. 400x</p>](https://digitalhistology.org/wp-content/uploads/2017/10/Or.Dig_.Tub_.LgI-12-3-ping.png)
Rectum
These images compare the recto-anal junction (left) with the junction of the anal canal with the anus (right). For the recto-anal junction, the transition from simple columnar epithelium with goblet cells of the rectum to the stratified squamous moist epithelium of the anal canal is abrupt. The junction of the anal canal with the anus, lined by a keratinized stratified squamous epithelium, is a bit more gradual. 400x
![Anal canal <p>These images compare the recto-anal junction (left) with the junction of the anal canal with the anus (right). For the recto-anal junction, the transition from simple columnar epithelium with goblet cells of the rectum to the stratified squamous moist epithelium of the anal canal is abrupt. The junction of the anal canal with the anus, lined by a keratinized stratified squamous epithelium, is a bit more gradual. 400x</p>](https://digitalhistology.org/wp-content/uploads/2017/10/Or.Dig_.Tub_.LgI-12-4-ping.png)
Anal canal
These images compare the recto-anal junction (left) with the junction of the anal canal with the anus (right). For the recto-anal junction, the transition from simple columnar epithelium with goblet cells of the rectum to the stratified squamous moist epithelium of the anal canal is abrupt. The junction of the anal canal with the anus, lined by a keratinized stratified squamous epithelium, is a bit more gradual. 400x
![Anus <p>These images compare the recto-anal junction (left) with the junction of the anal canal with the anus (right). For the recto-anal junction, the transition from simple columnar epithelium with goblet cells of the rectum to the stratified squamous moist epithelium of the anal canal is abrupt. The junction of the anal canal with the anus, lined by a keratinized stratified squamous epithelium, is a bit more gradual. 400x</p>](https://digitalhistology.org/wp-content/uploads/2017/10/Or.Dig_.Tub_.LgI-12-5-ping.png)
Anus
These images compare the recto-anal junction (left) with the junction of the anal canal with the anus (right). For the recto-anal junction, the transition from simple columnar epithelium with goblet cells of the rectum to the stratified squamous moist epithelium of the anal canal is abrupt. The junction of the anal canal with the anus, lined by a keratinized stratified squamous epithelium, is a bit more gradual. 400x
![Simple columnar epithelium with goblet cells <p>These images compare the recto-anal junction (left) with the junction of the anal canal with the anus (right). For the recto-anal junction, the transition from simple columnar epithelium with goblet cells of the rectum to the stratified squamous moist epithelium of the anal canal is abrupt. The junction of the anal canal with the anus, lined by a keratinized stratified squamous epithelium, is a bit more gradual. 400x</p>](https://digitalhistology.org/wp-content/uploads/2017/10/Or.Dig_.Tub_.LgI-12-6-ping.png)
Simple columnar epithelium with goblet cells
These images compare the recto-anal junction (left) with the junction of the anal canal with the anus (right). For the recto-anal junction, the transition from simple columnar epithelium with goblet cells of the rectum to the stratified squamous moist epithelium of the anal canal is abrupt. The junction of the anal canal with the anus, lined by a keratinized stratified squamous epithelium, is a bit more gradual. 400x
![Stratified squamous moist epithelium <p>These images compare the recto-anal junction (left) with the junction of the anal canal with the anus (right). For the recto-anal junction, the transition from simple columnar epithelium with goblet cells of the rectum to the stratified squamous moist epithelium of the anal canal is abrupt. The junction of the anal canal with the anus, lined by a keratinized stratified squamous epithelium, is a bit more gradual. 400x</p>](https://digitalhistology.org/wp-content/uploads/2017/10/Or.Dig_.Tub_.LgI-12-7-ping.png)
Stratified squamous moist epithelium
These images compare the recto-anal junction (left) with the junction of the anal canal with the anus (right). For the recto-anal junction, the transition from simple columnar epithelium with goblet cells of the rectum to the stratified squamous moist epithelium of the anal canal is abrupt. The junction of the anal canal with the anus, lined by a keratinized stratified squamous epithelium, is a bit more gradual. 400x
![Stratified squamous, keratinized (dry) epithelium <p>These images compare the recto-anal junction (left) with the junction of the anal canal with the anus (right). For the recto-anal junction, the transition from simple columnar epithelium with goblet cells of the rectum to the stratified squamous moist epithelium of the anal canal is abrupt. The junction of the anal canal with the anus, lined by a keratinized stratified squamous epithelium, is a bit more gradual. 400x</p>](https://digitalhistology.org/wp-content/uploads/2017/10/Or.Dig_.Tub_.LgI-12-8-ping.png)
Stratified squamous, keratinized (dry) epithelium
These images compare the recto-anal junction (left) with the junction of the anal canal with the anus (right). For the recto-anal junction, the transition from simple columnar epithelium with goblet cells of the rectum to the stratified squamous moist epithelium of the anal canal is abrupt. The junction of the anal canal with the anus, lined by a keratinized stratified squamous epithelium, is a bit more gradual. 400x