Here's why:
* Merocrine glands are the most common type of exocrine gland. They release their secretions directly through the cell membrane via exocytosis without any loss of cell cytoplasm.
* Apocrine glands release their secretions by pinching off a portion of the cell's cytoplasm, along with the secretory product.
* Holocrine glands release their secretions by the entire cell disintegrating, releasing the contents along with the cell debris.
Examples of merocrine glands include:
* Salivary glands
* Sweat glands (eccrine)
* Pancreas (secretes digestive enzymes)
* Gastric glands (secretes gastric juices)
Let me know if you have any other questions.