Question

WHAT IS MEANT BY XYLEM AND PHLOEM?

Answer 1

xylem carry water and minerals up from the root,phloem carry glucose from leaves up and down the plant

Answer 2

Xylem is a complex permanent tissue composed of a thick-walled and dead cells.

• Xylem is also called water conducting tissue.

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${\bold { \underline{\large{Types\: -}}}}$

Xylem tissue consists of four different type of cells-

$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\sf \bullet\: Tracheids$

$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\sf \bullet\: Vessels$

$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\sf \bullet\: Xylem \:parenchyma$

$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\sf \bullet\: Xylem\: fibres$

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${\bold { \underline{\large{Functions\:- }}}}$

$\longrightarrow$Xylem tissue is mainly concerned with the conduction of water and minerals from root to different plant parts.

$\longrightarrow$It provides mechanical support to the plant.

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Phloem is the living conducting tissue. it contains tubes for the transport of food products from green and storage organs of the plant to other organs.

• Phloem is also called the bast.

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${\bold { \underline{\large{Types\:- }}}}$

It consists of five types of of cells or elements

$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\sf \bullet\: Sieve \:cells$

$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\sf \bullet\: Sieve\: tubes$

$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\sf \bullet\: Companion \:cells$

$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\sf \bullet\: Phloem\: parenchyma$

$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\sf \bullet\: Phloem\: fibres$

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${\bold { \underline{\large{function- }}}}$Phloem tissue helps in conduction of food from leaves to storage organs.

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$\bf\sf\large\:\:\:\:Differences \:between\: Xylem\: and$$\bf\sf\large\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:Phloem$

$\underline{\underline{\maltese\:\: \textbf{\textsf{XYLEM}}}}$

• $\small\red{ \large\star}$Contains many dead element except xylem parenchyma.

• $\small\green{ \large\star}$Two types of conducting elements, tracheids and vessels are found.

• $\small\pink{ \large\star}$It helps in conduction of water and inorganic solutes.

• $\small\blue{ \large\star}$It also provides mechanical strength to the plant.

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$\underline{\underline{\maltese\:\: \textbf{\textsf{PHLOEM}}}}$

• $\small\purple{ \large\star}$It contains many living cells except phloem fibres.

• $\small\pink{ \large\star}$Only one type of conducting element, namely sieve tubes are present.

• $\small\orange{ \large\star}$It helps in conduction of food or organic solute.

• $\small\gray{ \large\star}$Only phloem fibres provide mechanical strength to the plant body.