Secretions

In human tissues

Many human cell types have the ability to be secretory cells. They have a well-developed endoplasmic reticulum, and Golgi apparatus to fulfill this function. Tissues that produce secretions include the gastrointestinal tract, which secretes digestive enzymes and gastric acid, the lungs, which secrete surfactants, and sebaceous glands, which secrete sebum to lubricate the skin and hair. Meibomian glands in the eyelid secrete meibum to lubricate and protect the eye.