Beneath the body of the mandible in the sub maxillary triangle. The submandibular lymph nodes sit between the submandibular salivary glands, which are underneath the tongue, and the mandible, or lower jawbone.
When these lymph nodes enlarge through infection, you may have a red, painful swelling in the area of the parotid or submandibular glands. Lymph nodes also enlarge due to tumors and inflammation. Tumors: Primary benign and malignant salivary gland tumors usually show up as painless enlargements of these glands. Besides these glands, there are many tiny glands called minor salivary glands located in your lips, inner cheek area (buccal mucosa), and extensively in other linings of your mouth and throat. 1 Lymph nodes are important part of the immune system. 2  Lymph nodes are located throughout the body, but visible and palpable only when they are enlarged or swollen. 3  Lymph nodes are regional, and each group of them corresponds to a particular region of the body and reflects abnormalities in that region. 1 Lymph nodes are located throughout the body, but visible and palpable only when they are enlarged or swollen. 2 Summary Information: Submandibular Lymph Nodes. Submandibular Lymph Nodes: Submandibular lymph nodes are glands that are a part of the immune system and are located below the jaw. Submandibular lymph nodes consist of lymphatic tissues enclosed by a fibrous capsule.  These lymph nodes are the structures in the upper neck that often become tender during a common sore throat. In fact, many of these lymph nodes are actually located on, within, and deep in the substance of the parotid gland or near the submandibular glands. Besides these glands, there are many tiny glands called minor salivary glands located in your lips, inner cheek area (buccal mucosa), and extensively in other linings of your mouth and throat. submandibular lymph nodes. The submandibular lymph nodes sit between the submandibular salivary glands, which are underneath the tongue, and the mandible, or lower jawbone. Occasionally one or more of the lymph nodes may be embedded deep within the salivary gland. The lymphatic system is part of the immune system, which helps the body fight diseases and other harmful agents. Lymph nodes act as points of filtration and cell multiplication within this system. Secondary infection of salivary glands from adjacent lymph nodes also occurs. These lymph nodes are the glands in the upper neck which often become tender during a common sore throat Many of these lymph nodes are actually located on, within, and deep in the substance of the parotid gland, near the submandibular glands.  The submandibular lymph nodes (submaxillary glands in older texts), three to six in number, are placed beneath the body of the mandible in the submaxillary triangle, and rest on the superficial surface of the submandibular gland. The afferents of the submandibular glands drain the medial palpebral commissure, the cheek, the side of the nose, the upper lip, the lateral part of the lower lip, the gums, and the anterior part of the margin of the tongue. The submandibular nodes are small, usually measuring approximately 1 centimeter in a healthy adult. The submandibular duct, which brings lymph fluid to the node, is approximately 5 to 6 centimeters long in the average adult. The wall of the duct is thin and flexible. Occasionally one or more of the lymph nodes may be embedded deep within the salivary gland. The lymphatic system is part of the immune system, which helps the body fight diseases and other harmful agents. Lymph nodes act as points of filtration and cell multiplication within this system. Submandibular Lymph Nodes. There are many cervical (neck) lymph nodes, like the Submandibular one, which is in the neck that can cause a swelling or enlargement in the neck. Enlargement can often mean the presence of an infection or disease. Lymphatic fluid drains from different regions of the head and neck. When these lymph nodes become overwhelmed with debris from an illness or infection, it can cause them to become swollen and sensitive. Only a medical professional can diagnose the cause of the swelling. The submandibular lymph nodes location is along the underside of the jaw on either side. It is responsible for lymphatic drainage of the tongue, submaxillary (salivary) gland, lips, mouth, and conjunctiva (mucous membrane that covers the eyeball and under surface of the eyelid)
http://www.entnet.org/content/salivary-glands http://www.medicinenet.com/swollen_lymph_nodes/article.htm http://www.rightdiagnosis.com/organ/submandibular_lymph_nodes.htm http://www.entnet.org/content/salivary-glands http://www.healthline.com/human-body-maps/submandibular-lymph-nodes http://www.entassociates.com/salivary_glands.htm https://en.wikipedia.org/wiki/Submandibular_lymph_nodes http://www.healthline.com/human-body-maps/submandibular-lymph-nodes http://www.thelymphnodes.com/locations/neck-lymph-nodes/submandibular-lymph-nodes/
where are the submandibular lymph nodes located