Final answer:
The back does not contain lymph nodes that you can easily feel during a home health check, unlike the easily palpable nodes in the neck, groin, and armpit.
Step-by-step explanation:
The location that does not contain lymph nodes you can easily feel during a home health check is the back. Lymph nodes are part of the lymphatic system, which helps the body fight infection and disease. They are usually more prominent and palpable in areas such as the neck (cervical lymph nodes), groin (inguinal lymph nodes), and armpit (axillary lymph nodes). These are the regions where lymph nodes are superficial enough to be felt by hand when they are swollen or enlarged. In contrast, lymph nodes in the back are not typically palpable because they are located deeper within the body and are surrounded by muscle and other tissues. The neck, groin, and armpit are common areas where lymph nodes can be easily felt during self-examination.