Organs in Plants

Plants are multicellular organisms, just like animals. They also usually contain differentiated cells, tissues and organs. Tissues The table shows some examples of plant tissues and their functions. Epidermal tissue    ---    Covers the plant Mesophyll    ---    Carries out photosynthesis Xylem and phloem    ---   Transport of substances around the plant

Organs Examples of plant organs include: Roots Stems Leaves Leaves Leaves are adapted to absorbing sunlight for photosynthesis.

Adaptations of a leaf:Chlorophyll    ----    To absorb sunlightLarge surface area    ----    To absorb more lightStomata    ----    To let carbon dioxide diffuse into the leafThin    ----    Short distance for carbon dioxide to diffuse into leaf cellsNetwork of veins    ----    To support the leaf and transport water and carbohydrates

The leaf You should be able to describe the internal structure of a leaf.Adaptations:

Thin, waxy cuticlemade of wax                -            To protect the leaf without blocking out lightThin, transparentepidermis                     -            To allow more light to reach the palisade cellsLayer of palisade cells on the top surface  -            To absorb lightMany chloroplasts in the palisade cells   -             To increase absorption of light                 Spongy mesophyllinside the leaf   -  Air spaces allow carbon dioxide to diffuse through the leaf, and increase the surface area

Organs in a plant

The Leaf