The major glands of the endocrine system include the pineal gland, pituitary gland, pancreas, ovaries, testes, thyroid gland, parathyroid gland, hypothalamus and adrenal glands. The hypothalamus and pituitary gland are neuroendocrine organs.
A newspaper lead (or lede if you prefer) can do its job in one sentence, but with few exceptions, a paragraph will contain more than one sentence. The OWL site, aimed at college students, suggests a length of from three to five or more sentences.
How long should a paragraph be? There is no absolute rule: very short or long paragraphs can work when used by an experienced writer. However, as a guideline, paragraphs should usually be no less that 2 or 3 sentences long and there should be 2 or 3 paragraphs per page of A4.