唾液是由外分泌腺分泌出来的。

Saliva is secreted from the exocrine gland.

外分泌腺可以仅由制造粘液的单细胞组成。

Exocrine Glands may consist of only single cells that make mucus.

可见一正常胰岛被外分泌腺胰腺的腺泡包绕。

Here is a normal pancreatic islet of Langerhans surrounded by normal exocrine pancreatic acinar tissue.