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shinedo9820
1 năm trước
a) Ở người, khi nuốt và đẩy thức ăn qua thực quản, bộ phân nào ngăn cản thức ăn vào 2 lỗ mũi? b) Hãy giải thích nghĩa đen về mặt sinh học câu thành ngữ " nhai kĩ no lâu " c) Có ý kiến cho rằng " Thức ăn chỉ thực sự được tiêu hóa ở ruột non " .Em hãy nhận xét ý kiến trên
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