![Page 1: ORGANS OF PLANTS The physiology of plants. Roots, Stems and Leaves Chapter 23: pgs. 579-607 Learning Targets: I can describe the structure and function](https://reader036.vdocument.in/reader036/viewer/2022062408/56649ee45503460f94bf2acd/html5/thumbnails/1.jpg)
ORGANS OF PLANTS
The physiology of plants
![Page 2: ORGANS OF PLANTS The physiology of plants. Roots, Stems and Leaves Chapter 23: pgs. 579-607 Learning Targets: I can describe the structure and function](https://reader036.vdocument.in/reader036/viewer/2022062408/56649ee45503460f94bf2acd/html5/thumbnails/2.jpg)
Roots, Stems and Leaves
Chapter 23: pgs. 579-607 Learning Targets:
I can describe the structure and function of the four major plant organs; roots, stem, leaf and flower.
I can name the three tissue types that comprise these organs.
I can explain the role of the leaf in plant gas exchange by including the role of the stomata.
I can differentiate between primary and secondary growth.
![Page 3: ORGANS OF PLANTS The physiology of plants. Roots, Stems and Leaves Chapter 23: pgs. 579-607 Learning Targets: I can describe the structure and function](https://reader036.vdocument.in/reader036/viewer/2022062408/56649ee45503460f94bf2acd/html5/thumbnails/3.jpg)
The three principle organs of a plant
Roots: Absorb water and
dissolved nutrients, Store nutrients Anchor the plant
Stems: Support the plant Transport nutrients
Leaves: Photosynthesis Gas exchange Water transportation
![Page 4: ORGANS OF PLANTS The physiology of plants. Roots, Stems and Leaves Chapter 23: pgs. 579-607 Learning Targets: I can describe the structure and function](https://reader036.vdocument.in/reader036/viewer/2022062408/56649ee45503460f94bf2acd/html5/thumbnails/4.jpg)
Plant Tissue Systems
Dermal Tissue: Coverings Epidermal cells – cuticle
Vascular Tissue: Transportation Xylem – Vessel Elements Phloem – Sieve Tube elements and
companion cells Ground Tissue: Storage and Support
Parenchyma – storage Collenchyma – support Sclerenchyma - support
Meristematic Tissue: Growth Apical meristem - differentiation
![Page 5: ORGANS OF PLANTS The physiology of plants. Roots, Stems and Leaves Chapter 23: pgs. 579-607 Learning Targets: I can describe the structure and function](https://reader036.vdocument.in/reader036/viewer/2022062408/56649ee45503460f94bf2acd/html5/thumbnails/5.jpg)
Roots:
Taproot – a primary root (Dicots) Fibrous roots – no single root grows larger
than the rest (Monocots) A mature root has an outside layer, the
epidermis, and a central cylinder of vascular tissue. Between these two tissues lies a large area of ground tissue.
The root surface is covered with tiny cellular projections called root hairs. These are able to penetrate spaces between soil particles and produce a large surface area.
![Page 6: ORGANS OF PLANTS The physiology of plants. Roots, Stems and Leaves Chapter 23: pgs. 579-607 Learning Targets: I can describe the structure and function](https://reader036.vdocument.in/reader036/viewer/2022062408/56649ee45503460f94bf2acd/html5/thumbnails/6.jpg)
Roots:
![Page 7: ORGANS OF PLANTS The physiology of plants. Roots, Stems and Leaves Chapter 23: pgs. 579-607 Learning Targets: I can describe the structure and function](https://reader036.vdocument.in/reader036/viewer/2022062408/56649ee45503460f94bf2acd/html5/thumbnails/7.jpg)
Roots:
![Page 8: ORGANS OF PLANTS The physiology of plants. Roots, Stems and Leaves Chapter 23: pgs. 579-607 Learning Targets: I can describe the structure and function](https://reader036.vdocument.in/reader036/viewer/2022062408/56649ee45503460f94bf2acd/html5/thumbnails/8.jpg)
Roots:
![Page 9: ORGANS OF PLANTS The physiology of plants. Roots, Stems and Leaves Chapter 23: pgs. 579-607 Learning Targets: I can describe the structure and function](https://reader036.vdocument.in/reader036/viewer/2022062408/56649ee45503460f94bf2acd/html5/thumbnails/9.jpg)
Stems:
Stems have three important functions: they produce leaves, branches and flowers, they hold leaves up to the sunlight (support) and they transport substances between roots and leaves.
![Page 10: ORGANS OF PLANTS The physiology of plants. Roots, Stems and Leaves Chapter 23: pgs. 579-607 Learning Targets: I can describe the structure and function](https://reader036.vdocument.in/reader036/viewer/2022062408/56649ee45503460f94bf2acd/html5/thumbnails/10.jpg)
Stems
![Page 11: ORGANS OF PLANTS The physiology of plants. Roots, Stems and Leaves Chapter 23: pgs. 579-607 Learning Targets: I can describe the structure and function](https://reader036.vdocument.in/reader036/viewer/2022062408/56649ee45503460f94bf2acd/html5/thumbnails/11.jpg)
Plant Growth and Meristematic Tissue:
![Page 12: ORGANS OF PLANTS The physiology of plants. Roots, Stems and Leaves Chapter 23: pgs. 579-607 Learning Targets: I can describe the structure and function](https://reader036.vdocument.in/reader036/viewer/2022062408/56649ee45503460f94bf2acd/html5/thumbnails/12.jpg)
Plant Growth and Meristematic Tissue:
![Page 13: ORGANS OF PLANTS The physiology of plants. Roots, Stems and Leaves Chapter 23: pgs. 579-607 Learning Targets: I can describe the structure and function](https://reader036.vdocument.in/reader036/viewer/2022062408/56649ee45503460f94bf2acd/html5/thumbnails/13.jpg)
Primary and Secondary Growth
![Page 14: ORGANS OF PLANTS The physiology of plants. Roots, Stems and Leaves Chapter 23: pgs. 579-607 Learning Targets: I can describe the structure and function](https://reader036.vdocument.in/reader036/viewer/2022062408/56649ee45503460f94bf2acd/html5/thumbnails/14.jpg)
Secondary Growth in Woody Plants
![Page 15: ORGANS OF PLANTS The physiology of plants. Roots, Stems and Leaves Chapter 23: pgs. 579-607 Learning Targets: I can describe the structure and function](https://reader036.vdocument.in/reader036/viewer/2022062408/56649ee45503460f94bf2acd/html5/thumbnails/15.jpg)
Secondary Growth in Woody Plants
![Page 16: ORGANS OF PLANTS The physiology of plants. Roots, Stems and Leaves Chapter 23: pgs. 579-607 Learning Targets: I can describe the structure and function](https://reader036.vdocument.in/reader036/viewer/2022062408/56649ee45503460f94bf2acd/html5/thumbnails/16.jpg)
Leaves:
The structure of a leaf is optimized for absorbing light and carrying out photosynthesis.
To collect sunlight, most leaves have a thin flattened sections called blades. The blade is attached to the stem by a thin stalk called a petiole.
![Page 17: ORGANS OF PLANTS The physiology of plants. Roots, Stems and Leaves Chapter 23: pgs. 579-607 Learning Targets: I can describe the structure and function](https://reader036.vdocument.in/reader036/viewer/2022062408/56649ee45503460f94bf2acd/html5/thumbnails/17.jpg)
Leaves:
The leaf has many functions for the plant: Photosynthesis
Mesophyll (ground tissue) is the main site for photosynthesis
Transpiration Stomata – porelike openings in the underside of the leaf
for gas exhange/Guard Cells – specialized cells in the epidermis that control the opening of the stomata.
Gas Exchange Plants keep their stomata open just enough to allow
photosynthesis to take place but not so much that they lose an excess amount of water.
Stomata/Guard Cells
![Page 18: ORGANS OF PLANTS The physiology of plants. Roots, Stems and Leaves Chapter 23: pgs. 579-607 Learning Targets: I can describe the structure and function](https://reader036.vdocument.in/reader036/viewer/2022062408/56649ee45503460f94bf2acd/html5/thumbnails/18.jpg)
Leaves:
![Page 19: ORGANS OF PLANTS The physiology of plants. Roots, Stems and Leaves Chapter 23: pgs. 579-607 Learning Targets: I can describe the structure and function](https://reader036.vdocument.in/reader036/viewer/2022062408/56649ee45503460f94bf2acd/html5/thumbnails/19.jpg)
Leaves:
![Page 20: ORGANS OF PLANTS The physiology of plants. Roots, Stems and Leaves Chapter 23: pgs. 579-607 Learning Targets: I can describe the structure and function](https://reader036.vdocument.in/reader036/viewer/2022062408/56649ee45503460f94bf2acd/html5/thumbnails/20.jpg)
Stomata and Guard Cells
Why do you think Stomata have Guard Cells?
Why are stomata on the underside of the leaves?
![Page 21: ORGANS OF PLANTS The physiology of plants. Roots, Stems and Leaves Chapter 23: pgs. 579-607 Learning Targets: I can describe the structure and function](https://reader036.vdocument.in/reader036/viewer/2022062408/56649ee45503460f94bf2acd/html5/thumbnails/21.jpg)
Leaves:
![Page 22: ORGANS OF PLANTS The physiology of plants. Roots, Stems and Leaves Chapter 23: pgs. 579-607 Learning Targets: I can describe the structure and function](https://reader036.vdocument.in/reader036/viewer/2022062408/56649ee45503460f94bf2acd/html5/thumbnails/22.jpg)
Leaves: Quiz!
![Page 23: ORGANS OF PLANTS The physiology of plants. Roots, Stems and Leaves Chapter 23: pgs. 579-607 Learning Targets: I can describe the structure and function](https://reader036.vdocument.in/reader036/viewer/2022062408/56649ee45503460f94bf2acd/html5/thumbnails/23.jpg)
Homework:
Pg. 605 & 606 questions 1-27