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Week 3 Vocabulary

Photosynthesis Photosynthesis is the process by which plants use sunlight to convert water and carbon dioxide into simple sugars
Cellular Respiration What cells do to break up sugars into a form that the cell can use as energy
Chlorophyll A green pigment that traps energy from the sun
Glucose A simple sugar that is an important energy source in living organisms and is a component of many carbohydrates
Epidermis The outer layer of cells covering an organism, in particular
Stomata Any of the minute pores in the epidermis of the leaf or stem of a plant, forming a slit of variable width that allows movement of gases in and out of the intercellular spaces
Transpiration The process in plants by which water is taken up by the roots and released as water vapor through stomata in the leaves
Carbon Dioxide A waste product made by cells of the body; a gas in the air made of carbon and oxygen atoms: Humans rid themselves of carbon dioxide waste by exhaling, or breathing out
Oxygen An element that makes up about 21% of Earth's atmosphere; a gas in Earth's atmosphere and in water that living organisms breathe
Guard Cells Each of a pair of curved cells that surround a stoma, becoming larger or smaller according to the pressure within the cells
Cellulose An insoluble substance that is the main constituent of plant cell walls and of vegetable fibers such as cotton. It is a polysaccharide consisting of chains of glucose monomers
Tropism The turning of all or part of an organism in a particular direction in response to an external stimulus
Xylem The vascular tissue in plants that conducts water and dissolved nutrients upward from the root and also helps to form the woody element in the stem
Phloem The vascular tissue in plants that conducts sugars and other metabolic products downward from the leaves
Created by: Adrienne7412