How many lymph nodes are in the human body and where are they located?
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Lymph nodes are part of a  lymph vessel system that branches throughout the human body. There are about 100 (not sure if anyone has counted them all) that end up at a point called a 'lymph node'. The lymph vessel system is part of the immune system. It's job is to filter the body of foreign debris and than at some point returns back to the blood stream. Microscopic cancer cells that seed from a 'primary tumor' have the ability to enter the lymphatic system and travel throughout the body and lodge almost anywhere.\nSome notable locations for the lymph nodes are  neck, groin, armpit,  central chest, and abdominal cavity. \n\nLymphatic System\nhttp://en.wikipedia.org/wiki/Lymphatic_system\n\nLymph Node\nhttp://en.wikipedia.org/wiki/Lymph_node
1084015
Probably swollen lymph node. Should be gone in a week.
209363
In case you were referring to the Skin:\nOn average one square centimeter of skin contains about 10 hair follicles and 15 sebaceous glands, 100 sweat glands, half a meter of blood vessels, 2 meters of nerves, with 3,000 sensory cells at the ends of nerve fibers, 200 nerve endings to record pain, 25 pressure receptors for the perception of tactile stimuli, 2 sensory receptors for cold, and 12 sensory receptors for heat.
230761
It sounds like an inflamed lymph node, nothing serious. Lymph nodes are the body's way of saying you have an infection somewhere near that area. Yes, go to the doctor.
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The immune system is the system of specialized cells and organs that protect an organism from outside biological influences. (Though in a broad sense, almost every organ has a protective function - for example, the tight seal of the skin or the acidic environment of the stomach.) When the immune system is functioning properly, it protects the body against bacteria and viral infections, destroying cancer cells and foreign substances. If the immune system weakens, its ability to defend the body also weakens, allowing pathogens, including viruses that cause common colds and flu, to grow and flourish in the body. The immune system also performs surveillance of tumor cells, and immune suppression has been reported to increase the risk of certain types of cancer.
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The lymphatic system is involved with immunological protection for all systems of the body, thus helping all systems to stay in homeostasis:\n\n1. In general: immune cells protect the entire body from attack by pathogens, foreign cells, cancer, etc\n2. excess interstitial fluid and leaked plasma proteins taken from skin too.  Even antibodies found in sweat.\n3. lymph drains excess int. fluid from connective tissue around bone\n4. lymph drains excess int fluid from muscles\n5. lymph can help distribue hormones and drain excess int fluid from endocrin glands\n6. lymph returns excess fluid from capillaries to venopus blood; macrophages destroy old rbcs and remove debris in blood\n7. tonsils, macrophages protect lungs from pathogens; lymph drains excess int fluid from lungs\n8. tonsils and macrophages also protect GI tract from invading pathogens; antibodies in saliva and GI secretions; lacteals in villi absorb dietary lipids and transport them to blood. lymph drains excess int fluid from GI organs\n9. lymph drains excess int fluid from urinary organs; defends agains toxins and pathogins that penetrate urinary tract via urethra\n10. drain excess int fluid from reprod organs; defense against toxins, pathogens entering vagina or penis; antibodies cancross the placenta to provide immuneprotection to developing fetus; antibodies also in colostrum of early milk fed to infant in breastfeeding
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Feel around the top of your neck, around the line where you feel your pulse. If your glands are swollen you should feel two lumps on either side of where your trachea lies, protruding from your next.\n\nAnother place to feel them is in the armpit! \n\nIf your not sure exactly where too look, search lymph glands/nodes through Yahoo or Google and see what diagrams come back!
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Right in the crease of the leg where your thigh meets the pelvis.  The nodes there are called the inguinals, they are some of the body's main lymph nodes.  If yours are swollen, you could have an infection such as bladder, kidney, etc.
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Lymph nodes are any of numerous oval bodies, distributed throughout the lymphatic system, that produce and house lymphocytes (white blood cells formed in lymphatic tissue) and filter microorganisms and other particles from lymph. \nThey are a defense mechanism of the body against infection and disease.
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Lung: pleural lymph nodes\nHead: submandibular\nLiver: Hepatic
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Your skin is your largest organ. It covers your entire body and has a surface area of around 2 square metres. Its thickness varies from 0.5mm on your eyelids to 4mm or more on the palms of your hands and the soles of your feet. In total, it accounts for around 16 percent of your body weight.
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* Cardiovascular system: blood circulations with heart and blood vessels\n    * Digestive system: processing food with mouth, stomach and intestines\n    * Endocrine system: communicating within the body using hormones\n    * Immune system: defending against disease-causing agents\n    * Integumentary system: skin, hair and nails\n    * Lymphatic system: structures involved in the transfer of lymph between tissues and the bloodstream\n    * Muscular system: moving the body\n    * Nervous system: collecting, transferring and processing information with brain and nerves\n    * Reproductive system: the sex organs\n    * Respiratory system: the organs used for breathing, the lungs\n    * Skeletal system: structural support and protection through bones\n    * Urinary system: the kidneys and associated structures involved in the production and excretion of urine
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Having swollen glands (Lymph Nodes) are a typical symptom of many viral illnesses, such as colds or sore throats, that often get better with home treatment.\n\nThe lymph nodes filter lymph fluid as it flows through them, trapping bacteria, viruses, and other foreign substances, which are then destroyed by special white blood cells called lymphocytes.\n\nLymph nodes may be found singly or in groups, and they may be as small as the head of a pin or as large as an olive. Groups of lymph nodes can be felt in the neck, groin, and underarms. Lymph nodes generally are not tender or painful. Most lymph nodes in the body cannot be felt.
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There are 206 bones in the human body.
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Enlarged lymph nodes such as swollen glands in the neck are lymph glands which are a part of the lymph system and an important part of your body's immune system. These swollen lymph nodes / glands in the neck, usually do not indicate acute leukemia, lymphoma cancer or lymph node cancer.  Early symptoms of leukemia, symptoms of lymphoma, the types of leukemia, and the causes of leukemia are covered below if you have concerns of lymph cancer or lymphoma symptoms or have been diagnosed. The truth is that tender and swollen lymph nodes usually indicate an infection and should be addressed by supporting the body naturally and building up the immune system to fight the problem. Another situation where swollen lymph nodes may be noticed is after injury to the body as the lymph glands are responsible for protecting the body from infection.
520500
Through the lympathic system.
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The lymph nodes are all over the entire body.  Most anatomy text books will tell you different names for all of them because there is such high variablility in just where they all are person to person.  On a woman the most important group are the axillary lymph nodes of the armpit, which is where breast cancer is most likely to metastesize to first.