Plant cells and tissues

The Body’s Organization

Plant System(Tissues)

Abstract

Types of plant cells

Abstract

Plants are composed of three major organ groups: roots, stems and leaves.

These organs are comprised of tissues working together for a common goal (function).

Plant tissues are characterized and classified according to their structure and function.

Plant cells have unique structures, including a central vacuole, plastids, and a cell wall.

Organism

Organs

Tissue Systems

Tissues

Cells

The Body’s Organization

Plant system

Note:Epidermis is the single exterior layer that protects the stems, leaves, flowers, and roots. The outside surface of the epidermis tissue is usually covered with a waxy substance called cutin, which reduces water loss.

Types of plant cells

MeristematicParenchyma CollenchymaSclerenchymaXylem Phloem

Meristematic Tissues

Meristematic tissues are cells or group of cells that have the ability to divide. These tissues in a plant consist of small, densely packed cells that can keep dividing to form new cells.Meristems give rise to permanent tissues and have the following characteristics:-the cells are small, the cells walls are thin, cells have large nuclei, vacuoles are absent or very small, there are no intercellular spaces.

Parenchyma, the most abundant ground tissue, consists of thin-walled, metabolically active cells that carry out a variety of functions in the plant, including photosynthesis and storage

Parenchyma

Collenchyma tissue is composed of narrow, elongated cells with thick primary walls. Collenchyma cells provide structural support to the growing plant body, particularly shoots, and their thickened walls are nonlignified, so they can stretch as the organ elongates. Collenchyma cells are typically arranged in bundles or layers near the periphery of stems or leaf petioles.

Collenchyma

Sclerenchyma consists of two types of cells, sclereids and fibers. Both have thick secondary walls and are frequently dead at maturity. Sclereids occur in a variety of shapes, ranging from roughly spherical to branched, and are widely distributed throughout the plant. In contrast, fibers are narrow, elongated cells that are commonly associated with vascular tissues. The main function of sclerenchyma is to provide mechanical support, particularly to parts of the plant that are no longer elongating.

Sclerenchyma

Xylem is a structurally complex tissue that conducts water and nutrients from the roots to all parts of the plant. The xylem is comprised of a series of long tubes made up of shorter vessel members. In woody plants, the xylem tissue becomes the wood.

Xylem

Phloem tissue conducts food and metabolites from photosynthesis throughout the plant, including down to the roots.

Phloem

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Done by / Ahmed Elwan

Group 6 Alsayed Ahmed AlsayedMohamed Salah Ismail MohamedAmr Alsayed Abdul HadyAhmed Elwan Abdul Fattah Abo Hamad