States of Matter: Facts. Matter is all around us. Matter is the air you are breathing. Matter is the computer you are reading from now. Matter is the stuff you touch and see. And it is more. Matter is defined as anything that has mass and takes up space.
The high specificity at 10 and 11 mmindicates that lymph nodes of this size are almostalways metastatic in this level.A study of level II lymph nodes shows that for thewhole population a minimum diameter of 8 mm givesa relatively high sensitivity and specificity of 81% and80%, respectively.
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.ccasionally 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.