Anatomy of lymph nodes in different animal species

• Lymph nodes in animals are located throughout the body, including the neck, armpits, groin, and abdomen.
• The lymph nodes are encapsulated and contain various types of immune cells.
• Lymphatic vessels carry lymph fluid from tissues to the lymph nodes for filtration and removal of foreign material.
• In dogs and cats, the popliteal lymph node (located behind the knee) is commonly used for diagnostic purposes.

• Lymph nodes are located throughout the body, including the neck, armpits, groin, and thorax.
• Cattle have a large number of lymph nodes in their digestive system, particularly in the mesentery.
• The lymph nodes are encapsulated and contain various types of immune cells.
• Lymphatic vessels carry lymph fluid from tissues to the lymph nodes for filtration and removal of foreign material.
• In cows, the presence of enlarged lymph nodes can indicate various diseases, such as tuberculosis.

• Lymph nodes are located throughout the body, including the neck, armpits, groin, and thorax.
• Pigs have a large number of lymph nodes in their digestive system, particularly in the mesentery.
• The lymph nodes are encapsulated and contain various types of immune cells.
• Lymphatic vessels carry lymph fluid from tissues to the lymph nodes for filtration and removal of foreign material.
• In pigs, the presence of enlarged lymph nodes can indicate various diseases, such as porcine circovirus.

Birds:

• Lymph nodes are located throughout the body, including the neck, wings, and legs.
• Birds have a unique lymphatic system that includes multiple lymph hearts (small muscular sacs that pump lymph fluid) and lymph ducts.
• The lymph nodes are encapsulated and contain various types of immune cells.
• Lymphatic vessels carry lymph fluid from tissues to the lymph nodes for filtration and removal of foreign material.
• In birds, the lymphatic system is important for maintaining fluid balance and immune function.