Instead, endocrine glands secrete their hormones directly into the surrounding extracellular space.

相反，内分泌腺直接将激素分泌到周围的细胞外间隙。

The collection of endocrine glands makes up the endocrine system.

内分泌腺集合起来构成内分泌系统。

The main endocrine glands are the pituitary, thyroid, parathyroid, adrenal, pancreas and gonads.

主要的内分泌腺为垂体、甲状腺、甲状旁腺、肾上腺、胰腺和性腺。

Stress begins with something called the hypothalamus pituitary adrenal axis, a series of interactions between endocrine glands in the brain and on the kidney, which controls your body's reaction to stress.

压力开始于一种叫做下丘脑垂体肾上腺轴的东西，一连串的相互作用，在大脑的内分泌腺和肾脏之间，它会控制身体对压力的反应。

The former exerts its control by means of chemical messengers called hormones. Hormones are produced by a variety of endocrine glands, which release the hormones directly into the blood stream.

垂体是人体的主要腺体，位于头脑中间部的下方。它产生至少8种激素，影响生长，肾功能和性器官的发育。

The hormone thyroxin, for example, is secreted by an endocrine gland — your thyroid — and it needs to be distributed throughout the entire body so that it can stimulate the metabolism in all of your cells.

例如，激素甲状腺素由内分泌腺分泌——你的甲状腺——它需要分布在整个身体中，以便它可以刺激所有细胞的新陈代谢。

Because some of the pituitary's hormones stimulate other glands to produce their own hormones, the pituitary called the master gland. Others endocrine glands are the thyroid, the pancreas and the adrenal glands.

大脑、脊髓、和神经也控制着身体活动。

And, carbon dioxide and other waste products of cellular metabolism are absorbed from the tissues for transport to the organs of elimination. The blood also transports hormones from endocrine glands to their target organs.

并且，细胞代谢的二氧化碳和其他废料从组织中被吸收以运输到排泄器官。血液还将激素从内分泌腺体运输到它们的靶器官。

Endocrine glands release hormones in response to one or more of the following stimuli