Systems of life. Blood: 3.
Roberts
A
A
D000917:Antibody Formation; D001790:Blood Physiological Phenomena; D006801:Humans; D007111:Immunity, Cellular; D007114:Immunization; D007962:Leukocytes / Q000166:cytology / Q000502:physiology*; D008214:Lymphocytes / Q000276:immunology*