Starter What property of water allows plants to absorb water by pulling water molecules from the soil? What structure do plant cells have that animal cells do not? What type of organisms occupy the first trophic level on food pyramid? What type of species interaction is it when a bee pollinates a flower? Are plants eukaryotic or prokaryotic?

There are 4 main organs of a plant. Do you know what they are?

Four Main Organs of a Plant Flowers – reproductive organs Leaves Stems Roots

Plant Organs

What are the functions of these shoes? When would these shoes be worn?

What structures (parts) help the shoes to fulfill their function?

Objective I can diagram and label the structures of plant organs and describe the organ’s function.

Structure & Function of Organs Structure: the arrangement and relations between the parts of an organ Function: an activity or purpose of the organ

Root Function Absorbs water and nutrients Stores nutrients Anchors the plant to the ground

Diagram & Label the Root Root hairs Vascular cylinder Zone of elongation Root tip

Root Hairs Root hairs: tiny projections from the outer surface of a root Penetrates the spaces between soil particles Produces a large surface area which water can be absorbed

Vascular Cylinder Vascular cylinder: center of the root which holds the vascular tissue – xylem and phloem Stores water and nutrients

Zone of Elongation Zone of elongation: the cells in the area above the root tip The cells stretch by taking in water The growth pushes the root further into the soil

Root Tip Root tip: structure that protects a root as it forces its way through the soil

Stem Function Support system for the plant body Transports nutrients and water Produce leaves, branches, and flowers

Diagram & Label the Stem Vascular bundle Pith

Vascular Bundle The vascular bundle holds veins of xylem and phloem. Xylem: transports water throughout the plant Phloem: transports nutrients throughout the plant Phloem Cambium Xylem

Vascular Bundle Vascular cambium: produces new layers of vascular tissue causing the stem to become thicker and thicker – giving plants support and structure Phloem Cambium Xylem

Pith Pith: stores and transports nutrients through the plant

Leaf Function Photosynthesis

Leaf Function Thin leaves provide: maximum surface area to collect sunlight minimal distance to carbon dioxide and water

Diagram & Label the Leaf Cuticle Vein Guard Cell Stomata

Cuticle Barrier that prevents evaporation of water

Veins Inside each vein strands of xylem which transport water and strands of phloem which transport sugars.

Guard Cells & Stomata Stomata: gaps on the leaf surface that open and close allowing water and gases to enter & leave the plant Guard cell: control gas exchange – swollen with water they open stomata

Flower Function Flowers are the plant’s reproductive organs. Flowers are usually both male and female.

Diagram & Label the Flower

The female reproductive structures are called carpels and have 3 parts. The stigma is sticky and is where the pollen attaches. The style is the long tube that attaches the stigma to the ovary. The pollen will travel down this tube to the ovary. The ovary is the enlarged base of a carpel which stores eggs until they are fertilized and develop into seeds.

The male reproductive structures are called the stamens and have 2 parts. The anther produces pollen. Pollen produced by the anther is carried by insects or other animals to the pistil of another. The filament supports the anther.

There will be a quiz on parts and function of the flower next class.