Which of the following statements are true about T cells: (select all that apply)

A. Inguinal nodes are located in the groin area, not in the knee.
B. Popliteal nodes are located behind the knee (in the popliteal fossa) and are responsible for filtering lymph from the lower leg and foot.
C. Tibial nodes are not a specific term used for lymph nodes in the knee area.
D. Mesenteric nodes are located in the abdomen and are associated with the digestive system, not the knee.

A. Naturally acquired active immunity occurs when the body is exposed to a pathogen, and the immune system produces its own antibodies in response. This type of immunity is not related to the transfer of antibodies from mother to fetus.
B. Artificially acquired active immunity involves vaccination, where the immune system is exposed to a weakened or inactivated pathogen to stimulate an immune response. This does not involve the transfer of antibodies from the mother.
C. Artificially acquired passive immunity involves the transfer of antibodies through medical interventions, such as antibody injections or serum treatments. While this involves passive immunity, it is not naturally occurring, nor is it related to placental transfer.
D. Naturally acquired passive immunity refers to the transfer of antibodies from mother to fetus through the placenta. These antibodies provide temporary protection to the newborn against infections, and this process is a natural example of passive immunity.