ScienceCâu 59 / 120
Which organ system is primarily responsible for transporting oxygen and nutrients throughout the body?
a.Digestive system
b.Circulatory system
c.Skeletal system
d.Integumentary system
Giải thích
The circulatory (cardiovascular) system uses the heart, blood, and vessels to transport oxygen, nutrients, and waste throughout the body. The digestive system breaks down food, and the skeletal system provides structure.
Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
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