roots, stems, and leaves
DESCRIPTION
Roots, Stems, and Leaves. Biology 11. Organs Systems. Plants have 4 organ system 3 are vegetative organs Leaf, stem root 1 is reproductive Flower . Roots. Absorb water and dissolved nutrients from soil Anchor plants to ground Hold plant upright. Stems. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Roots, Stems, and Leaves](https://reader036.vdocuments.site/reader036/viewer/2022081503/5681625d550346895dd2b495/html5/thumbnails/1.jpg)
Roots, Stems, and LeavesBiology 11
![Page 2: Roots, Stems, and Leaves](https://reader036.vdocuments.site/reader036/viewer/2022081503/5681625d550346895dd2b495/html5/thumbnails/2.jpg)
Organs SystemsPlants have 4 organ system• 3 are vegetative organs•Leaf, stem root• 1 is reproductive•Flower
![Page 3: Roots, Stems, and Leaves](https://reader036.vdocuments.site/reader036/viewer/2022081503/5681625d550346895dd2b495/html5/thumbnails/3.jpg)
Roots•Absorb water and dissolved nutrients from soil•Anchor plants to ground•Hold plant upright
![Page 4: Roots, Stems, and Leaves](https://reader036.vdocuments.site/reader036/viewer/2022081503/5681625d550346895dd2b495/html5/thumbnails/4.jpg)
Stems•Can be thin and herbaceous or massive and woody•Provide structural support•Water and nutrient transport•Some stems for storage (ex. Potato is a tuber)
![Page 5: Roots, Stems, and Leaves](https://reader036.vdocuments.site/reader036/viewer/2022081503/5681625d550346895dd2b495/html5/thumbnails/5.jpg)
LeavesFunction:• Large surface area for receiving sunlight•photosynthesis takes place in mesophyll
• Covered in waxy cuticle
![Page 6: Roots, Stems, and Leaves](https://reader036.vdocuments.site/reader036/viewer/2022081503/5681625d550346895dd2b495/html5/thumbnails/6.jpg)
![Page 7: Roots, Stems, and Leaves](https://reader036.vdocuments.site/reader036/viewer/2022081503/5681625d550346895dd2b495/html5/thumbnails/7.jpg)
Stomata• Small openings in leaf that open or close•Opening and closing is regulated by guard cells
•Mainly found on the underside of leaves (for land plants)
![Page 8: Roots, Stems, and Leaves](https://reader036.vdocuments.site/reader036/viewer/2022081503/5681625d550346895dd2b495/html5/thumbnails/8.jpg)
• Functions:•Open to take in carbon dioxide and release oxygen and water•Close to decrease water loss
![Page 9: Roots, Stems, and Leaves](https://reader036.vdocuments.site/reader036/viewer/2022081503/5681625d550346895dd2b495/html5/thumbnails/9.jpg)
Vascular TissueXylem•Carries water and dissolved nutrients from roots to stems and leaves•Provides strength •Made of tracheid Cells•Functioning cells are dead
![Page 10: Roots, Stems, and Leaves](https://reader036.vdocuments.site/reader036/viewer/2022081503/5681625d550346895dd2b495/html5/thumbnails/10.jpg)
Phloem• Carry products of
photosynthesis from one part to another
• Main cells are sieve tube elements and companion cells
• Functioning cells are alive
![Page 11: Roots, Stems, and Leaves](https://reader036.vdocuments.site/reader036/viewer/2022081503/5681625d550346895dd2b495/html5/thumbnails/11.jpg)
How Water Moves Up to the Leaves• Root Pressure•Roots absorb water that must move up
• Capillary Action•Water movement opposes gravity in small tubes•adhesion (stick to side of tube) and cohesion (stick to each other) of water molecules
• Transpiration from Leaves • evaporation of water causes the pulling of the
next water molecule up to take place