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LAB #1 BIO 162

Cal Poly, laboratory #1, Plant tissue and cell types

WordDefinition
Apical Meristems Produce cells that will contribute to vertical growth and are located at the shoot and root tips
Lateral meristems Produce cells that contribute to lateral growth
Epidermal Tissue Single-layered group of cells that covers plants leaves, flowers, roots and stems. Protects against water loss, regulates gas exchange, secretes metabolic compounds, and absorbs water and minerals
Ground Tissue Consists of three different types of tissue: parenchyma, Collenchyma, and sclerenchyma
Vascular Tissue Composed of xylem and phloem, which transport fluid and nutrients internally in the plant.
Chloroplasts Organelles that conduct photosynthesis. Capture light and convert into free energy in the form of ATP
Plasma Membrane Separates the interior of the cells from the environment
Collenchyma Thick-walled (primary cell wall) cells under the epidermis
Fibers Have tapered ends and thick lignified secondary cell walls with no plasma membrane
Sclereids The cell type that makes up the lignified secondary cell wall
Lumen The cavity or channel within the cell
Middle Lamella Pectin layer which cements the cell walls of two adjoining cells together
Vessels The broad, stout cells with open ends
Tracheids Cell types intermediate in form to fibers and vessels
Xylem One of the two types of vascular tissue
Phloem The other type of vascular tissue that has sieve elements
Bordered pits Pits that have a plug-like structure called a torus that seals off the opening between adjacent cells and prevents air from spreading
Perforations A small hole in thin material
Sieve Tube members A type of elongated sclerenchyma cells in phloem tissue
Companion cells Cells that appear as if they have just divided from sieve tubes
Sieve Plates Pores in the plant cells walls that facilitate movement of liquid
Created by: ahypnaro
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