Plant Tissue and Cells Flashcards
What is the function of dermal tissue?
Protection
What are the two types of dermal tissue? What are their characteristics?
Epidermis- single layer, green, only primary growth
Periderm- replaces epidermis, brown, formed of cork, secondary growth
What is the function of vascular tissue?
Transportation and structure
What are the two types of vascular tissue? What are their characteristics?
Xylem- functional maturity when dead, conducts water and dissolved minerals from root to shoot (against gravity- negative pressure)
Phloem- functional maturity when alive, transports sugars from leaves to roots or leaves to fruit
What is the function of ground tissue?
Storage and structure
What are the two types of ground tissue? What are their characteristics?
Cortex- adjacent to dermal tissue (toward outside)
Pith- between vascular tissue (toward center)
What are parenchyma cells? Function? Name an example
Thin and flexible cells that perform most metabolic functions of plants and synthesize and store various organic products (stored in vacuoles).
Example: chloroplasts
What are collenchyma cells? Function? Name an example
Elongated cells with uneven thickness that help support young parts of plant shoots, provide flexibility
Example: Celery
What are sclerynchema cells? Function? Name an example
rigid, thick and contain lignin (strengthening component creating a rigid structure) that support the foundation of the plant and occur in areas where the plant has stopped growing
Example: Pit of a fruit or bamboo
What makes up water conduction cells of the xylem? What is their function? (2)
Trachieds- move water from cell to cell through pits
Vessels- wider, shorter tubes to enable free flowing water
What makes up SUGAR conducting cells in phloem? What is their function? (2)
Sieve plates- enable nutrients to move from cell to cell
Companion cells- assist with sieve plates in the movement of sugars/nutrients
Transport happens from what to what?
Source to Sink
