Lub luag haujlwm tseem ceeb ntawm phloem yog kev thauj mus los ntawm cov suab thaj thiab kev txhawb nqa tshuab. Plaub hom phloem yog: sieve tube hlwb, cov hlwb ua ke, fibers (tsuas yog cov hlwb tuag hauv phloem), thiab parenchyma.
Cov hlwb twg yog cov hlwb tuag hauv phloem?
Pholem feem ntau muaj cov hlwb muaj sia (fibres yog tib lub hlwb tuag hauv phloem). Lawv suav nrog xylem hlab ntsha, fiber ntau thiab tracheids. Lawv muaj phloem fibers, sieve tubes, sieve hlwb, phloem parenchyma thiab khub hlwb.
Qhov twg tuag hauv phloem?
Phloem muaj plaub yam xws li cov hlab ntsha, cov hlwb sib luag, phloem Parenchyma thiab phloem fibers. Phloem fibers yog cov khoom tuag lossis cov khoom tuag muaj nyob hauv phloem.
Puas phloem puas muaj hlwb tuag?
Tsis zoo li xylem (uas yog tsim los ntawm cov cell tuag),phloem yog tsim los ntawm cov hlwb tseem nyob uas thauj sap. Cov kua txiv hmab txiv ntoo yog cov kua dej, tab sis nplua nuj nyob hauv cov suab thaj ua los ntawm photosynthesis.
YPuas Collenchyma yog cov ntaub so ntswg tuag?
Collenchyma yog thick walled dead tissue.