If you do not sign up for Medicare Part B when you are first eligible, you may need to pay a late enrollment penalty for as long as you have Medicare. Your monthly Part B premium could be 10% higher for every full 12-month period that you were eligible for Part B, but didn't take it.
The human body contains lymph nodes throughout, primarily in the head and neck, but also under the arms and in the groin. The lymphatic system consists of lymph nodes along with a number of organs and vessels. Keep Learning.
Lymph nodes are small bean-shaped structures that are usually less than 2.5 cm in length. They are widely distributed throughout the body along the lymphatic pathways where they filter the lymph before it is returned to the blood. Lymph nodes are not present in the central nervous system. There are three superficial regions on each side of the body where lymph nodes tend to cluster. These areas are the inguinal nodes in the groin, the axillary nodes in the armpit, and the cervical nodes in the neck. The typical lymph node is surrounded by a connective tissue capsule and divided into compartments called lymph nodules.