Image of gland lumen captured under a biological laboratory microscope with the Jenoptik C14+ microscope camera.
- Endocrine glands secrete their products through the basal lamina and lack a duct system.
- Exocrine glands secrete their products through a duct and include one of three secretory products:
2. Mucous glands secrete a viscous product, rich in carbohydrates (also known as glycoproteins).
3. Sebaceous glands secrete a lipid product (also known as oil glands).