KEY CONCEPT Plants have specialized cells and tissue systems.

1. The student is expected to:5B examine specialized cells, including roots, stems, and leaves of plants...; 10B describe the interactions that occur among systems that perform the functions of transport, reproduction, and response in plants; 10C analyze the levels of organization in biological systems and relate the levels to each other and to the whole system

2. KEY CONCEPTPlants have specialized cells and tissue systems.

3. Parenchyma cells are the most common plant cell type. store starch, oils andwater help heal wounds tothe plant have thin flexible walls Plant tissues are made of three basic cell types.

4. they are strong and flexible. celery strings are strands of collenchyma. they have unevenly thick cell walls. • Collenchyma cells provide support to a growing plant.

5. second cell wall hardened by lignin die when they reach maturity used by humans to make linen and rope • Sclerenchyma cells are the strongest plant cell type.

6. Dermal tissue covers the outside of a plant. protects the plant secretes cuticle of leaves forms outer bark of trees Plant organs are made of three tissue systems.

7. provides support stores materials in roots and stems most commonly made of parenchyma • Ground tissue is found inside a plant.

8. two networks of hollow tubes xylem transports water and minerals phloem transports photosynthetic products stem leaf root • Vascular tissue transports water, minerals and organic compounds.