Plant Organs Structure, Functions & Adaptations.

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Presentation transcript:

Plant Organs Structure, Functions & Adaptations

3 main functions absorb water and dissolved minerals from the soil anchor the plant in the soil store carbohydrates

Structures & Functions Cells change structure to become specialized in structure and function. Epidermal cells become root hairs and internal cells become xylem and phloem.

Structures & Functions Cells change structure to become specialized in structure and function. Epidermal cells become root hairs and internal cells become xylem and phloem. Cells no longer divide, they lengthen pushing the tip of the root through the soil

Structures & Functions Cells change structure to become specialized in structure and function. Epidermal cells become root hairs and internal cells become xylem and phloem. Cells no longer divide, they lengthen pushing the tip of the root through the soil parenchyma cells that help protect the growing tissues as the root grows

Structures & Functions Cortex: made of parenchyma cells that transport and store water, minerals and food. All materials pass through on their way to the vascular tissue

Structures & Functions Cortex: made of parenchyma cells that transport and store water, minerals and food. All materials pass through on their way to the vascular tissue Endodermis: one-cell thick, regulates lateral movement of water

Structures & Functions Cortex: made of parenchyma cells that transport and store water, minerals and food. All materials pass through on their way to the vascular tissue Endodermis: one-cell thick, regulates lateral movement of water Epidermis: produce root hairs

ADAPTED FOR ABSORPTION Root Adaptations ADAPTED FOR ABSORPTION Epiphytic plants are adapted to absorb moisture from the AIR. These plants grow on other plants (or a building) with their roots hanging down. Ex: Orchids

Root Adaptations ADAPTED FOR AERATION Pneumatophores roots that are adapted to absorb oxygen from the AIR. These plants grow are found in extreme wet conditions. Ex: Mangrove

Root Adaptations ADAPTED FOR SUPPORT Prop roots are adapted help support the plant. (Also called stilt roots) These roots grow out from lateral branches. Ex: Sugar cane & Maize

Root Adaptations ADAPTED FOR STORAGE Tap roots & tubular roots & some rhizomes are adapted to store water and sugars. That is why they are a good food source.

Station 1a) Root Hairs

Station 1b) Root Hairs

Station 2 Monocot Root

Station 3 Dicot Root

Station 4 Root systems Refer to textbook page 554 *note find another example for each type on internet*