Key Words
Small scale that is placed in a microscope eyepiece
What is an eyepiece graticule?
Tube formed from tube elements lined up end to end
What is a sieve tube?
The non-living system of interconnected cell walls extending throughout a plant, used as a transport pathway for the movement of water and mineral ions
What is apolast pathway?
A layer covering, and secreted by, the epidermis; in plants it is made of fatty substance which helps to provide protection against water loss an infection
What is cuticle?
A basic plant tissue typically used as packing tissue between more specialized structures; it is metabolically active and may have a variety of functions such as food storage and support; also play an important role in the movement of water and food products in the xylem and phloem
What is parenchyma?
Very small, accurately drawn scale of known dimensions, engraved on a microscope slide
What is a micrometer?
A dead, empty tube with lignified walls, through which water is transported in plants; it is formed by xylem vessel elements lined up end to end
What is a xylem vessel?
A hard material made by plants and used to strengthen the cell walls of certain types of cell, particularly xylem vessel elements and sclerenchyma cells; it is the main material in wood
What is a lignin?
A cell with an unthickened cellulose wall and dense cytoplasm that is found in close association with a phloem sieve tube element to which it is directly linked via many plasmodesmata; this cell and the sieve tube element form a functional unit
What is a companion cell?
The living system of interconnected protoplasts extending through a plant; used as a transport pathway for the movement of water and solutes; individual protoplasts are connected via plasmodesmata
What is symplast pathway?
A strand of vascular tissue running longitudinal in a plant ; within the bundle, the arrangement of tissues like xylem, phloem and sclerenchyma varies in different plants and organs
What is vascular bundle?
A site in a plant which provides food for another part of the plant, the sink
What is a source?
The layer of cells surrounding the vascular tissue of plants; it is most clearly visible in root
What is endodermis?
A term referring to tubes or vessels
What is vascular?
Flowering plants can be classified monocotyledons or _________
What are dicotyledons?
A tissue in plants consisting mainly of xylem and phloem but also containing sclerenchyma and parenchyma cells
What is vascular tissue
A modified form of parenchyma in which the corners of the cells have extra cellulose thickening, providing extra support, as in the midrib of leaves and at the corners of square stems; in three dimensions the tissue occurs in strands (as in celery petioles)
What is collenchyma?
A system of fluid-filled tubes, vessels or spaces, most commonly use for long-distance transport in living organism
What is vascular system?
A plant adapted to survive in conditions where water is in short supply
What is xerophyte?
The loss of water vapor from a plant to its environment, it mostly take place through the stomata in the leaves
What is transpiration?
A site in a plant which receives food from another part of the plant, the source
What is a sink?
The outer layer of cells covering the body of a plant or animal; in plants it usually one cell thick and may be covered with a cuticle which provides additional protection against loss of water and disease
What is the epidermis?
A pore in the epidermis of a leaf, bounded by two guard cells and needed for efficient gas exchange
What is stoma?
A cell found in phloem tissue, with non-thickened cellulose walls, very little cytoplasm, no nucleus and end walls perforated to form sieve plates, through which sap containing sucrose is transported
What is sieve tube element?