Most of the hormones in our body are proteins, polypeptids, amino-acids based, but what?
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instant gratification.
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Peptides are chains of at least 2 amino acids.  A long peptide is typically called a protein.  Proteins do a lot of different things in the body.\n\nChemical reactions in th body need something to make them go faster, and proteins called enzymes do this.  For sugar and other molecules to go in and out of cells, channels or transport molecules have to be in cell membranes, and these are composed of protein.\n\nSkin and bone have a very strong fibrous protein in them called collagen.  In muscle the proteins actin and myosin interact (along with some other proteins) to give muscle contraction.\n\nYour body can even use peptides and proteins as an energy source, by breaking them down and burning them as fuel.
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hypothalmus\nanterior pituitary\nposterior pituitary\nthyroid\nparathyroid\nadrenal cortex/medulla\ngonads\npancreas\nthymus\npineal\n\nother organs can also secrete hormones which technically makes them partially endocrine.  these are:\n\nheart\nliver\nkidneys\nlungs\nintestines\nstomach\n\nhope i got em all
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The most important factor that dictates a hormones target organ is its ability to bind to the specific organ tissue and produce a response.  In order for this to occur the organ tissue must have the correct receptor that will bind to the hormone and produce a physiological response.  It is like the hormone is a key that will only work on certain organs.  In order for the organ to have a response to the hormone it must have the correct receptor, which is like the lock for the key.  In addition to having the right receptor (lock) for the hormone to fit and bind to, the binding of the hormone and receptor must be able to have an effect on the target tissue.  The ability of a certain tissue to have the correct receptor for a given hormone is properties of individual tissues and is a factor that helps differentiate a liver tissue from heart or brain tissues.
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B.\n\nA peptide hormone that is produced by fat cells. It plays a role in body weight regulation by acting on the hypothalamus to suppress appetite and burn fat stored in adipose tissue.
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The endocrine system produces hormones and works with the circulatory system - that carries them. The nervous system works with the respiratory system and every other system in the body; such as the gastrointestinal system and reproductive systems.
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The foundations of the endocrine system are the hormones and glands. As the body's chemical messengers, hormones (pronounced: hor-moanz) transfer information and instructions from one set of cells to another. Although many different hormones circulate throughout the bloodstream, each one affects only the cells that are genetically programmed to receive and respond to its message. Hormone levels can be influenced by factors such as stress, infection, and changes in the balance of fluid and minerals in blood.\n\nA gland is a group of cells that produces and secretes, or gives off, chemicals. A gland selects and removes materials from the blood, processes them, and secretes the finished chemical product for use somewhere in the body. Some types of glands release their secretions in specific areas. For instance, exocrine (pronounced: ek-suh-krin) glands, such as the sweat and salivary glands, release secretions in the skin or inside of the mouth. Endocrine glands, on the other hand, release more than 20 major hormones directly into the bloodstream where they can be transported to cells in other parts of the body. \n\nThe major glands that make up the human endocrine system are the hypothalamus, pituitary, thyroid, parathyroids, adrenals, pineal body, and the reproductive glands, which include the ovaries and testes. The pancreas is also part of this hormone-secreting system, even though it is also associated with the digestive system because it also produces and secretes digestive enzymes. Although the endocrine glands are the body's main hormone producers, some non-endocrine organs - such as the brain, heart, lungs, kidneys, liver, thymus, skin, and placenta - also produce and release hormones.\n\nThe hypothalamus (pronounced: hi-po-tha-luh-mus), a collection of specialized cells that is located in the lower central part of the brain, is the primary link between the endocrine and nervous systems. Nerve cells in the hypothalamus control the pituitary gland by producing chemicals that either stimulate or suppress hormone secretions from the pituitary. \n\nAlthough it is no bigger than a pea, the pituitary (pronounced: puh-too-uh-ter-ee) gland, located at the base of the brain just beneath the hypothalamus, is considered the most important part of the endocrine system. It's often called the "master gland" because it makes hormones that control several other endocrine glands. The production and secretion of pituitary hormones can be influenced by factors such as emotions and seasonal changes. To accomplish this, the hypothalamus relays information sensed by the brain (such as environmental temperature, light exposure patterns, and feelings) to the pituitary.\n\nThe tiny pituitary is divided into two parts: the anterior lobe and the posterior lobe. The anterior lobe regulates the activity of the thyroid, adrenals, and reproductive glands. Among the hormones it produces are:\n\ngrowth hormone, which stimulates the growth of bone and other body tissues and plays a role in the body's handling of nutrients and minerals \nprolactin (pronounced: pro-lak-tin), which activates milk production in women who are breastfeeding \nthyrotropin (pronounced: thigh-ruh-tro-pin), which stimulates the thyroid gland to produce thyroid hormones \ncorticotropin (pronounced: kor-tih-ko-tro-pin), which stimulates the adrenal gland to produce certain hormones \nThe pituitary also secretes endorphins (pronounced: en-dor-finz), chemicals that act on the nervous system to reduce sensitivity to pain. In addition, the pituitary secretes hormones that signal the ovaries and testes to make sex hormones. The pituitary gland also controls ovulation and the menstrual cycle in women. \n\nThe posterior lobe of the pituitary releases antidiuretic (pronounced: an-ty-dy-uh-reh-tik) hormone, which helps control body water balance through its effect on the kidneys and urine output; and oxytocin (pronounced: ahk-see-toe-sin), which triggers the contrac
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Hormones change in our bodies all the time.  You should consult with your doctor.
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peptide: Any of various natural or synthetic compounds containing two or more amino acids linked by the carboxyl group of one amino acid to the amino group of another.
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I agree with the above answer--- proteins.\neverything that we eat is made up of the basic amino acids or protein that is how we are able to digest them or consume them.
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Carbohydrates, Fats, Vitamins, Proteins, Minerals, Water
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The endocrine system is all about hormones, and the nervous system coordinates the activity of the muscles, monitors the organs, constructs and also stops input from the senses, and initiates actions.
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Your body makes use of hormones to send chemical signals that have myriad effects on what genes are expressed and what proteins are synthesized and what happens to your body.\n\nThere are always hormones active, and they are always in a state of change. They allow different parts of the body to communicate effectively with one another, so that one part can "tell" another what it is doing.
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Proteins, amino acids.
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The endocrine system is a control system of ductless glands that secrete chemical messengers called hormones that circulate within the body via the bloodstream to affect distant organs. Hormones act as "messengers", and are carried by the bloodstream to different cells in the body, which interpret these messages and act on them. The endocrine system does not include exocrine glands such as salivary glands, sweat glands and glands within the gastrointestinal tract.\n\nThe field of medicine that deals with disorders of endocrine glands is endocrinology, a branch of the wider field of internal medicine.\n\nHypothalamus \nThyrotropin-releasing hormone (TRH) \nGonadotropin-releasing hormone (GnRH) \nGrowth hormone-releasing hormone (GHRH) \nCorticotropin-releasing hormone (CRH) \nSomatostatin \nDopamine \nPituitary gland \nAnterior lobe (adenohypophysis) \nGH (human growth hormone) \nPRL (prolactin) \nACTH (adrenocorticotropic hormone) \nTSH (thyroid-stimulating hormone) \nFSH (follicle-stimulating hormone) \nLH (luteinizing hormone) \nPosterior lobe (neurohypophysis) \nOxytocin \nADH (antidiuretic hormone) \nPineal gland \nMelatonin \nThyroid gland \nThyroxine (T4), a form of thyroid hormone \nTriiodothyronine (T3), a form of thyroid hormone \nCalcitonin \nParathyroid gland \nParathyroid hormone (PTH) \nHeart \nAtrial-natriuretic peptide (ANP) \nStomach and intestines \nGastrin \nSecretin \nCholecystokinin (CCK) \nSomatostatin \nNeuropeptide Y \nLiver \nInsulin-like growth factor \nAngiotensinogen \nThrombopoietin \nIslets of Langerhans in the pancreas \nInsulin \nGlucagon \nSomatostatin \nAdrenal glands \nAdrenal cortex \nGlucocorticoids - cortisol \nMineralocorticoids - aldosterone \nAndrogens (including testosterone) \nAdrenal medulla \nAdrenaline (epinephrine) \nNoradrenaline (norepinephrine) \nKidney \nRenin \nErythropoietin (EPO) \nCalcitriol \nSkin \nCalciferol (vitamin D3) \nAdipose tissue \nLeptin \n\nIn males only\nTestes \nAndrogens (testosterone) \n\nIn females only\nOvarian follicle \nOestrogens \nTestosterone \nCorpus luteum \nProgesterone \nPlacenta (when pregnant) \nProgesterone \nHuman chorionic gonadotrophin (HCG) \nHuman placental lactogen (HPL) \n\nRole in disease\nDiseases of the endocrine system are common, such as diabetes mellitus and thyroid disease.\n\nEndocrineopathies can occur with any of these. Hypofunction can occur as result of loss of reserve, hyposecretion, agenesis, atrophy, destruction, etc. Hyperfunction can occur as result of hypersecretion, loss of suppression, tumor, hyperplasia, etc.\n\nEndocrineopathies are classified as primary, secondary, or tertiary.\n\nPrimary is target organ dysfunction and is normally associated with increased or decreased secretory hormones. Secondary is a dysfunction that originates elsewhere like the pituitary gland and is normally associated with increased or decreased production of trophic factors. Tertiary is associated with dysfunction of the hypothalamus and its releasing hormones.\n\nDiffuse Endocrine System\nOrgans aren't the sole way for hormones to be sent into the body; there are a host of specific cells which secrete hormones independently. These are called the "diffuse" endocrine system, and include myocytes in the heart (atria) and epithelial cells in the stomach and small intestines. In fact, if one were to classify any chemical excretions in the term "hormone," every cell in the human body could be considered a part of the endocrine system.
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Nitrogen is the key element which gives proteins their functionality. The body needs proteins to build and repair tissues. Animals get these proteins from plants who get it from the air. The nitrogen in the air also keeps us from bursting due to excessive respiration.
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Elements:\n\nMain constituents are H, C, O, N, with considerable amounts of Ca, Na, P, S, Cl, less Mg, K, Fe, I, and traces of about any common element.\n\nThe most common simple molecule is water.\n\nMost important "inorganic" compounds are CaCO3 (in the bones), NaCl (dissolved in the water) and Ca2(PO4)OH in the teeth.\n\nThe main classes of chemicals are carbohydrates and proteins, which form the main structural elements of our cells as well as most of the functional framework. (DNA for instance has a modified carbohydrate linked by phosphate as its structural basis). Fats (triglycerides of fatty acids) are abundant, but don't participate structurally in most features of human anatomy except as fillers (lower skin, lips, breasts...)