Chủ đề này có 2 trả lời

[handsomeboy_lp]

cau 1 :chung minh te bao la don vi chuc nang cua co the
cau 2: neu su khac nhau ve cau tao cau cac loai mach mau va giai thik su khac nhau do

[handsomeboy_lp]

hok ai tra loi ah

[hangel_elf]

Te bao la don vi cau tao cua co the ,co thuc hien day du chuc nang cua co the nhu:trao doi chat, lon len va sinh san, tra loi kich thich.Vi vay ma te bao cung la don vi chuc nang cua co the.
Su khac nhau cua cac mach mau:
- Dong mach:long hep hon tinh mach ,co thanh day nhat gom lop co ,dan hoi nhieu phu hop voi chuc nang nhan mot luong lon mau tong ra tu tam that voi ap luc lon, van toc mau nhanh
- Tinh mach:co thanh vach mong hon ,it dan hoi hon dong mach ,long rong hon dong mach ,phu hop voi chuc nang van chuyen mau ve tim voi van toc cham hon ,ap luc nho ,co van mot hcieu de mau khong chay nguoc
- Mao mach: cothanh vach rat mong phan nhanh nhieu ,chi co mot lop bieu bi phu hop voi chuc nang van chuyen mau rat cham de de thuc hien trao doi chat