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Lecture 59

BIOL 1010 Lecture 59: Lecture 59

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Biological Sciences
BIOL 1010
Emily A.Mc Kinnon

Oc78 Bio 1010 Phloem - Tissue with cells that transport sugars and other organic nutrients from leaves/storage tissue to other parts of the plant
- Each organ (root, stem, leaf) has three types of tissues (dermal, vascular, and ground tissue), which each form a tissue system. Each system connect the plant organs, and each is continuous throughout the plant (structure is different in the leaves, stems, and roots).
- Dermal tissue system - outer protective coating. In many plants the dermal layer consists of a single layer of tightly packed cells called the Epidermis.
- Epidermis - water and nutrients from soil enter through the epidermis. Outer layer.
- Most leaves have an epidermis with a layered called the Cuticle (waxy coating that helps reduce water loss).
- Vascular tissue system - Made of xylem and phloem. Provides support and long distance transport between root ans shot system.
- Ground tissue system - Tissues that are neither dermal or vascular. Bulk that fills the space between epidermis and vascular system
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