Organising the Organism
- Created by: Emily Gailey
- Created on: 13-12-12 10:04
View mindmap
- Organising the Organism
- Transport Tissues
- Xylem
- Xylem Vessels with Parenchyma Cells and Fibres.
- Meristem Cells produce cells that elongate. Their Walls become reinforced and waterproofed by Lignin. This kills the cell contents.
- The end of the cells break down so they can become continuous, long tubes.
- Suited for transporting water and Minerals UP the Plant, Also supports the plant
- Phloem
- Consists of Sieve Tube Elements and Companion Cells
- The Meristem Tissue produces Cells that Elongate and line up end to end to form a long tube.
- Their Ends do not break down completely, they form sieve plates between teh cells. The sieve plates allow the movement of Maerials UP/DOWN the tubes
- Next to eaach Sieve Tube is a companion cell. They are very metabolically Active.
- Their activities play an important role in moving the products of Photosynthesis UP/DOWN the plant.
- Xylem
- Epithelial Tissues
- Animal Tissues have 4 main catagories....
- Epithelial Tissue - Layers and Lining
- Connective Tissues - Hold structures together and provide support
- Muscle Tissue - Cells specialised to contract and move parts of the Body
- Nervous Tissue - Cells that can convert stimuli to electrical impulses and conduct those impulses
- Squamous Epithelial Tissue
- Flattened thin cells, makes them ideal for lining the insides of tubes ie/ blood vessels.
- Short Diffusion Distance
- Held in place by the basement membrane (secreated by the epithelial cells) It is made up of collagin and Glycoproteins. Attaches the cells to the tissue.
- Ciliated Epithelial Tissue
- Made up of Column-Shaped cells.
- Often forund in the inner surface of the tubes ie/ the Trachea
- The part of the cell surface that is 'exposed' in the Lumen is covered with cilia. The cilia wave in a synchronised rythem and move the Mucus
- Made up of Column-Shaped cells.
- Animal Tissues have 4 main catagories....
- Cooperation
- Addaptions of the Leaf.
- Transparent upper surface layer, the upper epidermis, lets light through.
- A Palisade layer underneath consists of long, thin, tightly packed cells containing a lot of chloroplasts.
- Loosly packed Spongy mesophyll layer has many air spaces to allow circulation of gases
- A Leaf vein system containing Xylem and Phloem tissues supports the leaf
- A lower Epidermis layer has pores called stomata these allow gases to be exchanged.
- Addaptions of the Leaf.
- Transport Tissues
- Flattened thin cells, makes them ideal for lining the insides of tubes ie/ blood vessels.
Comments
No comments have yet been made