Plant Tissues and Specialized Cells

Plant Tissues1Plant TissuesThere are 3 types of plant tissue:Dermal TissueVascular TissueGround Tissue

Dermal TissueIncludes:Epidermal TissuePeriderm Tissue

A thin layer of cells that covers the surface of leaves, stems and rootsRoot hairs are an extension of the epidermal tissue that increase the roots surface area for water and nutrient absorptionCan create a waxy cuticle to protect leaves from water loss

Epidermal TissueIn woody plants, epidermal tissue is replaced by periderm tissueproduces bark on stems and roots

Periderm TissueVascular TissueColour Changing Carnationshttp://www.youtube.com/watch?v=AMvEVnAFCNA

http://www.youtube.com/watch?v=po32400Al5w

Vascular TissueThe vascular tissue of a plant is like our circulatory system. It transports the water, nutrients and other chemicals throughout the plant.

Vascular TissueThere are 2 types of vascular tissue:

XylemPhloem

XylemElongated cells that, once matured, are hollow tubes with no organelles stacked end to end to create a tube from the roots to the shootsTransport water from the roots to the leaves of the plantOnce xylem cells are mature they are no longer living tissue

PhloemTransports sugars created by photosynthesis, other chemicals and hormones throughout the plantPhloem cells are living tissue

Vascular tissue is arranged in 2 different ways:Monocot vascular bundles (one xylem and one phloem tube) are arranged randomly throughout the stem

Dicot vascular bundles are arranged in a ring formation

Ground TissueGround tissue is the composed of all the tissue in between the dermal tissue and the vascular tissue. It performs different functions in the different parts of the plant In roots storage of carbohydratesIn Stems provides storage and supportIn Leaves performs photosynthesis