The lymphatic system

This image shows a person from the front. The head and body are shown down to the mid thigh. A network of fine lines is shown inside the body. These are the lymph vessels. They connect small oval shapes spread through the body. These are lymph nodes. 

The lymph vessels are shown travelling down in each side of the neck across each shoulder and into the armpits and upper arms. The ovals in the neck are called the neck or cervical lymph nodes. The ovals in the armpit are called the armpit or axillary lymph nodes. 

The lymph vessels also travel from the neck down the centre of the chest to the tummy area. The ovals in the chest are called the chest or mediastinal lymph nodes. The ovals in the tummy area are called the tummy or abdominal lymph nodes. 

From the tummy area, the lymph vessels split into two groups. One group connects to ovals at the top of the right leg and inner thigh. The other group connects to ovals at the top of the left leg and inner thigh. The ovals in these areas are called the groin or inguinal lymph nodes.