Which of the following is an endocrine gland?

The pituitary gland is an endocrine gland, meaning it plays a crucial role in the endocrine system by producing and secreting hormones directly into the bloodstream. These hormones regulate various bodily functions, including growth, metabolism, and reproductive processes. The pituitary gland is often referred to as the "master gland" because it influences many other endocrine glands.

In contrast, the salivary glands are exocrine glands that secrete saliva into the mouth through ducts, while sebaceous glands produce oil for skin lubrication and are also classified as exocrine glands. Lymph glands, or lymph nodes, are part of the lymphatic system and are involved in immune functions, rather than hormone secretion. This distinction is important in understanding the different roles that various glands play in the body.