General ScienceCâu 70 / 120
Which blood cells help fight infection in the body?
a.Red blood cells
b.White blood cells
c.Platelets
d.Plasma proteins
Giải thích
White blood cells are part of the immune system and defend the body against germs and infection. Red blood cells carry oxygen, and platelets help blood clot.
Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
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