T4 - sclerenchyma fibres, phloem vessels and xylem vessels

What is lignin

Lignin is a polysaccharide that is added to the secondary cell wall of plant cells in the transport vessel xylem and the sclerenchyma fibres.

What is the purpose of lignin

Lignin makes the cell walls less flexible and more rigid, adding strength to the vascular bundle.

what are sclerenchyma fibres made of

Made from dead cells that are tapered at the end

What is the phloem made of

Made of living cells lined into and forming a sieve tube elements, with surrounding companion cells

What are the uses of plant fibre is for humans

Biodiesel - a replacement for diesel Used for making materials such as ropes and fabric Production of plant fibre is cheaper than oil-based starch can be used to make bioplastics and bioethanol Substances derived from plants have antimicrobial and therapeutic properties -- like garlic and cinnamon sticks

What is the primary function of sclerenchyma fibres

To support the plant

What is the function of phloem

To transport organic solids via a process known as translocation

What is the primary function of xylem vessels

To transport water and inorganic ions around the plant

Structure of vascular bundles

Xylem are found towards the centre of the plant, followed by the phloem vessels, followed by sclerenchyma, the furthest out from the centre

What are the xylem vessels made of

form hollow tubes of dead cells