Page 164 - Biology Form Two

Biology for Secondary Schools

Hypotonic solution Macroelements
A solution with a low solute concentration Elements required by an organism in

Ileum relatively large amounts for their growth
The second part of the small intestine and survival

Immunity Malnutrition
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The ability of the body to resist infection The condition that occurs when the diet
and disease taken does not contain the right amount
of nutrients. Can either contain excess
Indigestible nutrients or inadequate nutrients
Refers to food items that are difficult or
impossible to digest, for example roughages Mammals
Animals which give birth and suckle their
Inhalation young
Drawing in air into the lungs
Mass flow
Iodine solution The bulk movement of substances in the
A reagent, which is used to test for the body of an organism from one region to
presence of starch another due to the difference in pressure
Isotonic solutions between the two regions
Two or more solutions with the same solute Mesophyll
concentrations The palisade layer and the spongy layer of
Kwashiorkor the leaf
A form of malnutrition in children caused Microelements
by deficiency of proteins in the body Elements that are needed for growth and

Lenticels survival by organisms in small quantities
Loosely packed cork cells located on the Minerals
bark of woody stems Solid naturally occuring inorganic

Lignin substances. In nutrition, minerals are
Tough material deposited on the walls of nutrients that an organism requires for proper
xylem vessels and tracheids body functioning

Lipids Monocotyledon plant
Compounds containing carbon, hydrogen, A plant that produces seeds with one
and oxygen. They are mainly fats and oils cotyledon, for example a maize plant

Lumen Multicellular organism
The hollow part of tubular structures such An organism that is made up of many cells.
as artery, vein, or intestine All multicellular organisms are eukaryotes,
meaning that their cells have well defined
Lung nuclei and organelles
The organ for gas exchange mostly in
mammals, reptiles, and birds Muscle cramps

158 Student’s Book - Form Two

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BIOLOGY FORM 2 NEW.indd 158
BIOLOGY FORM 2 NEW.indd 158 05/10/2024 15:36:47