Page 162 - Biology Form Two

Biology for Secondary Schools

Capillarity Commensalism
The action that causes water to move up in A symbiotic relationship between two
narrow tubes species in which one species benefits while

Capillaries the other does not benefit but remains
Thin-walled blood vessels that connect the unaffected
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arterioles and venules and penetrate deep Cortex
into tissues The part of the stem or root of a vascular
Carbohydrates plant between the pericycle and endodermis
Compounds made up of carbon, hydrogen, Crenation
and oxygen in the ratio of 1:2:1 Shrinking and shrivelling of cells leading

Carnivores to abnormal notched cell surface. This
Animals that feed on flesh of other animals occurs due to a loss of water when cells

CD4 Cells are placed in a hypertonic solution
Type of proteins found on the surface of Decomposers
the immune cells such as T-helper cells. Organisms that break down organic
They are usually encoded by CD4 genes materials. Examples of such organisms
and are transmitted from one generation to include bacteria and fungi
another
Dehydration
Churning Removal of water from a substance or
The mechanical breakdown of food into compound
smaller particles caused by contraction and
relaxation of the muscles of the stomach Detoxification
wall The process of removing harmful or toxic
substances from blood. It mainly takes
Chyme place in the liver.
Semi-liquid substance produced as a result
of mixing food with gastric juice in the Diastema
stomach The space on the lower jaw of a herbivore

Coenzyme Diastole
Is an organic molecules that enhences the The phase in the cardiac cycle when the
function of enzymes. It binds to enzymes auricles contract to pump blood into the
active sites to facilitate the catalytic ventricles
process but it not itself a protein Dicotyledon plant
Cohesion A plant that produces seeds with two
Attraction force between molecules of the cotyledons, for examples bean plant
same type Diffusion
Colon The movement of molecules or ions
Part of the large intestine of animals that of liquids or gases from a region of
helps in the absorption of water high concentration to a region of low
concentration

156 Student’s Book - Form Two

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BIOLOGY FORM 2 NEW.indd 156
BIOLOGY FORM 2 NEW.indd 156 05/10/2024 15:36:47