Antibodies and leukocytes are structures found in blood that defend the body from the invasion of pathogens. Which systems work together to produce and distribute antibodies and leukocytes throughout the body?

Responses

Muscular and Circulatory
Muscular and Circulatory ,

Digestive and Nervous
Digestive and Nervous ,

Immune and Circulatory
Immune and Circulatory ,

Respiratory and Endocrine