Xylem is a one way flow
Xylem transports water and minerals from the roots to the rest of the plant, while phloem transports sugars produced through photosynthesis from the leaves to other parts of the plant. Xylem consists of tracheids and vessel elements, while phloem is composed of sieve tube elements and companion cells.
Yes, when you sneeze, some people may experience phlegm coming out of their mouth.
In Angiosperms , it is xylem vessels ( proto and meta xylem together ) , Xylem sclerenchyma and xylem parenchyma ; together form Xylem tissue ( That is why xylem is called a compound tissue ). In Gymnosperms , xylem vessels are replaced by Xylem tracheids . All other tings are almost the same .
primary xylem is primary in nature & is derived from procambium. But secondary xylem is secondary in nature and derived from fascicular cambium and interfascicular cambium. Primary xylem is differentiated into protoxylem and metaxylem, but secondary xylem has no such differentiation. In primary xylem vessels and tracheids are long and narrow, and vessels don't have tyloses, but in secondary xylem, vessels are blocked by tyloses, and vessels and tracheids are wider and shorter. Xylem fibres are more abundant in secondary xylem , and found in small numbers in primary xylem. Also unlike in primary xylem, secondary xylem has differentiated into sapwood & heartwood.
Vascular tissue
differ in such a way that xylem transport water while phloem transport food and nutrients
Only flows in one direction
phlegm
The Vascular Cambium adds cells on both sides, producing secondary Xylem toward the inside of the stem This is true for most vascular plants except for the order Myrtales that has phloem on both sides of the xylem. The cambium structure is quite different in this order.
The vascular plants are differentiated in to root and shoot having conducting tissue in the form of xylem and phloem whereas mosses and liverworts have rhizoides in place of roots and lack xylem and phloem.
Phlegm will go into your stomach and the acid in your stomach will dispose of it naturally, just the way it does when you swollow food. It is not harmful to swallow phlegm.
Phlegm helps to trap foreign materials such as dirt, microbes and pollutants from going further into the body. Phlegm comes in different colors from shades of green to white.
I have a cough then suddenly, the phlegm was blocking my throat.
no
clear phlegm is normal. Red,Green,yellow is not normal---get help.
Vascular plants have xylem
Cough medicines may help either to control coughing or loosen the phlegm.