Photosynthesis and Respiration

Introduction to plant organ systems

Review – “layers” of cell organization

CELLSbasic unitbecome

specialized

TISSUESsimilar cells working

together

to perform a specific function

CELLSbasic unitbecome

specialized

ORGANSdifferent types of tissues working

together

to perform a specific function

TISSUESsimilar cells working

together

to perform a specific function

CELLSbasic unitbecome

specialized

ORGAN SYSTEMSdifferent organs working together

to perform a specific function

ORGANSdifferent types of tissues working

together

to perform a specific function

TISSUESsimilar cells working

together

to perform a specific function

CELLSbasic unitbecome

specialized

ORGANISMdifferent organ systems working together

ORGAN SYSTEMSdifferent organs working together

to perform a specific function

ORGANSdifferent types of tissues working

together

to perform a specific function

TISSUESsimilar cells working

together

to perform a specific function

CELLSbasic unitbecome

specialized

Plant OrganizationSTOP HERE and Brainstorm!

Things to consider

What do you know about the structure of plants?

What do plants require to survive?

How do different parts of the plant function to help the plant live?

What sorts of cells and tissues do you think plants must have?

Plant OrganizationPlants have two organ systems

The shoot system is above ground and includes the organs such as leaves, buds, stems, flowers and fruits.

The root system includes those parts of the plant below ground

Plants have four types of organs . . .Roots- anchor plant- absorb minerals and

water- stores nutrients

Stems- support and elevate

leaves- transport between roots

and shoots

Leaves- site of photosynthesis

Reproductive Organs- variable- include flowers, seeds,

fruit

. . and three types of tissue systems

Dermal Tissue- often called the

epidermis- a single layer of cells

that forms a protective “skin”

- secretes a waxy cuticle to prevent water loss

Vascular Tissue- transports water,

minerals and sugars between roots and shoots

- arranged in strands called vascular bundles

There are two types of vascular tissue:1) Xylem – transports water and dissolved minerals

UPWARD2) Phloem – transports sugars (food) made in leaves

DOWNWARD to roots and to other parts of shoot system

. . and three types of tissue systems

Ground Tissue- cells that fill the space

between the epidermis and vascular bundles

- ground tissue cells have two main functions

(1)structural – support the plant

(2)metabolic – life functions like photosynthesis

Leaf – cells and tissues

Vascular Tissue System

Monocots Dicots- Long tissue strands called vascular bundles scattered through stems

-Long tissue strands called vascular bundles arranged in rings within stem, to form a cylinder shape