We call the major salivary glands the parotid, submandibular, and sublingual glands. They all secrete saliva into your mouth, the parotid through tubes that drain saliva, called salivary ducts, near your upper teeth, submandibular under your tongue, and the sublingual through many ducts in the floor of your mouth.esides 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. Salivary glands produce the saliva used to moisten your mouth, initiate digestion, and help protect your teeth from decay.
NASA's Johnson Space Center in Houston has been the agency's human spaceflight hub for half a century, though not always under its current name.
NASA stands for the National Aeronautics and Space Administration. It is a government agency that was created by Congress in 1958. NASAâs mission is to explore space and aeronautics, or flight research. NASA is also responsible for making sure that the United States space program is conducted for peaceful purposes that can help mankind. The head of NASA has to be approved by the government. The president can give NASA directions, like when NASA was first instructed to land on the moon or build a space shuttle. The mission to land on Mars was also a presidential directive. Any proposed plan needs a lot of money, and Congress has to decide if they will give NASA the funds for the program.