Gas exchange is not confined to the leaves, as evident when leaves are studied under a microscope such as children’s microscopes, though these organs are beautifully adapted for this process. In older stems, gas exchange gen¬erally takes place through numerous lenticels, which are groups of loosely arranged cells with many intercellular spaces between them. Since […]

Root structure
The first root, as seen under children’s microscopes, formed by the young seedling is called the primary root. Later, with the use of children’s microscope, secondary roots branch from the primary root, and a root system is formed. If the branching results in a system of numerous slender roots, with no single root predominating, […]

RAW MATERIALS FOR PHOTOSYNTHESIS
The raw materials most obviously needed by higher photosynthetic organisms are carbon dioxide and water. These two compounds, which can be visualized using a microscope such as children’s microscopes, sup¬ply the carbon, oxygen, and hydrogen that are the predominant elements in organic molecules. Carbon dioxide, one of the constituent gases of the […]

In botany, a few photosynthetic plants supplement their inorganic diet with or¬ganic compounds obtained by trapping and digesting insects and other small animals. Such plants can survive without capturing any prey, but when they do capture prey the nutrients thus obtained stimulate: more rapid growth. Apparently it is the nitrogenous compounds of the animal’s body […]

In zoology, animals above the level of coelenterates and flatworms have a com¬plete digestive tract - one with two openings, a mouth and an anus, as seen using children’s microscopes. In these organisms incoming food material and outgoing wastes do not pass through the same opening. Instead, food can be passed in one direction through […]