Which part of the endocrine system is responsible for removing elements from the blood and converting them into new compounds?

The correct choice refers to the role of glands in the endocrine system, particularly in their function of processing substances in the body. Glands, as components of the endocrine system, are responsible for producing hormones that can influence various bodily processes, including metabolism and the conversion of substances.

In the context of the question, glands perform essential functions such as filtering and transforming elements from the bloodstream into new compounds, which includes the metabolism of nutrients and detoxification processes carried out by specific glands.

The thyroid gland, for instance, primarily regulates metabolism and energy usage but does not specialize in converting elements into new compounds directly. The adrenal gland is involved in stress response and also produces hormones but is not the primary site for the conversion of elements. The pancreas has a crucial role in digestion and blood sugar regulation, producing insulin and digestive enzymes; however, its function leans more towards regulating glucose levels rather than broad element conversion.

In summary, the term "glands" encompasses the broader functionality of the endocrine system in processing elements from the blood and facilitating their conversion into new substances necessary for various bodily functions.