![This is blank.](https://digitalhistology.org/wp-content/themes/histology-unified/imgs/trans.png)
Compound tubuloacinar gland
The secretory units in this gland consist of spherical acini and elongated tubules. Their secretions are immediately drained by intralobular ducts which flow into larger interlobular ducts located in the interlobular connective tissue between lobules. Interlobular ducts are often lined by a stratified columnar epithelium. Submandibular gland 400x
![Acini <p>The secretory units in this gland consist of spherical acini and elongated tubules. Their secretions are immediately drained by intralobular ducts which flow into larger interlobular ducts located in the interlobular connective tissue between lobules. Interlobular ducts are often lined by a stratified columnar epithelium. Submandibular gland 400x</p>](https://digitalhistology.org/wp-content/uploads/2017/06/T.E.Gl_.Ex_.Comp-13-7-ping.png)
Acini
The secretory units in this gland consist of spherical acini and elongated tubules. Their secretions are immediately drained by intralobular ducts which flow into larger interlobular ducts located in the interlobular connective tissue between lobules. Interlobular ducts are often lined by a stratified columnar epithelium. Submandibular gland 400x
![Tubules <p>The secretory units in this gland consist of spherical acini and elongated tubules. Their secretions are immediately drained by intralobular ducts which flow into larger interlobular ducts located in the interlobular connective tissue between lobules. Interlobular ducts are often lined by a stratified columnar epithelium. Submandibular gland 400x</p>](https://digitalhistology.org/wp-content/uploads/2017/06/T.E.Gl_.Ex_.Comp-13-6-ping.png)
Tubules
The secretory units in this gland consist of spherical acini and elongated tubules. Their secretions are immediately drained by intralobular ducts which flow into larger interlobular ducts located in the interlobular connective tissue between lobules. Interlobular ducts are often lined by a stratified columnar epithelium. Submandibular gland 400x
![Intralobular ducts <p>The secretory units in this gland consist of spherical acini and elongated tubules. Their secretions are immediately drained by intralobular ducts which flow into larger interlobular ducts located in the interlobular connective tissue between lobules. Interlobular ducts are often lined by a stratified columnar epithelium. Submandibular gland 400x</p>](https://digitalhistology.org/wp-content/uploads/2017/06/T.E.Gl_.Ex_.Comp-13-4-ping.png)
Intralobular ducts
The secretory units in this gland consist of spherical acini and elongated tubules. Their secretions are immediately drained by intralobular ducts which flow into larger interlobular ducts located in the interlobular connective tissue between lobules. Interlobular ducts are often lined by a stratified columnar epithelium. Submandibular gland 400x
![- Interlobular duct <p>The secretory units in this gland consist of spherical acini and elongated tubules. Their secretions are immediately drained by intralobular ducts which flow into larger interlobular ducts located in the interlobular connective tissue between lobules. Interlobular ducts are often lined by a stratified columnar epithelium. Submandibular gland 400x</p>](https://digitalhistology.org/wp-content/uploads/2017/06/T.E.Gl_.Ex_.Comp-13-1-ping.png)
- Interlobular duct
The secretory units in this gland consist of spherical acini and elongated tubules. Their secretions are immediately drained by intralobular ducts which flow into larger interlobular ducts located in the interlobular connective tissue between lobules. Interlobular ducts are often lined by a stratified columnar epithelium. Submandibular gland 400x
![-- Stratified columnar epithelium <p>The secretory units in this gland consist of spherical acini and elongated tubules. Their secretions are immediately drained by intralobular ducts which flow into larger interlobular ducts located in the interlobular connective tissue between lobules. Interlobular ducts are often lined by a stratified columnar epithelium. Submandibular gland 400x</p>](https://digitalhistology.org/wp-content/uploads/2017/06/T.E.Gl_.Ex_.Comp-13-2-ping.png)
-- Stratified columnar epithelium
The secretory units in this gland consist of spherical acini and elongated tubules. Their secretions are immediately drained by intralobular ducts which flow into larger interlobular ducts located in the interlobular connective tissue between lobules. Interlobular ducts are often lined by a stratified columnar epithelium. Submandibular gland 400x
![Lumen of ducts with saliva <p>The secretory units in this gland consist of spherical acini and elongated tubules. Their secretions are immediately drained by intralobular ducts which flow into larger interlobular ducts located in the interlobular connective tissue between lobules. Interlobular ducts are often lined by a stratified columnar epithelium. Submandibular gland 400x</p>](https://digitalhistology.org/wp-content/uploads/2017/06/T.E.Gl_.Ex_.Comp-13-5-ping.png)
Lumen of ducts with saliva
The secretory units in this gland consist of spherical acini and elongated tubules. Their secretions are immediately drained by intralobular ducts which flow into larger interlobular ducts located in the interlobular connective tissue between lobules. Interlobular ducts are often lined by a stratified columnar epithelium. Submandibular gland 400x
![Interlobular connective tissue <p>The secretory units in this gland consist of spherical acini and elongated tubules. Their secretions are immediately drained by intralobular ducts which flow into larger interlobular ducts located in the interlobular connective tissue between lobules. Interlobular ducts are often lined by a stratified columnar epithelium. Submandibular gland 400x</p>](https://digitalhistology.org/wp-content/uploads/2017/06/T.E.Gl_.Ex_.Comp-13-3-ping.png)
Interlobular connective tissue
The secretory units in this gland consist of spherical acini and elongated tubules. Their secretions are immediately drained by intralobular ducts which flow into larger interlobular ducts located in the interlobular connective tissue between lobules. Interlobular ducts are often lined by a stratified columnar epithelium. Submandibular gland 400x
![Blood vessels <p>The secretory units in this gland consist of spherical acini and elongated tubules. Their secretions are immediately drained by intralobular ducts which flow into larger interlobular ducts located in the interlobular connective tissue between lobules. Interlobular ducts are often lined by a stratified columnar epithelium. Submandibular gland 400x</p>](https://digitalhistology.org/wp-content/uploads/2017/06/T.E.Gl_.Ex_.Comp-13-8-ping.png)
Blood vessels
The secretory units in this gland consist of spherical acini and elongated tubules. Their secretions are immediately drained by intralobular ducts which flow into larger interlobular ducts located in the interlobular connective tissue between lobules. Interlobular ducts are often lined by a stratified columnar epithelium. Submandibular gland 400x