Page 64 - Biology Form Two

Biology for Secondary Schools

foods that produce gas, such as beans, (v) Avoid eating foods containing too
cabbage, onions, garlic, milk, and much fat or sugar.
bread. It can also result from eating (vi) Cover the mouth during yawning
meals that have too much fat, leading to avoid swallowing of air.
to the production of large amounts of
FOR ONLINE READING ONLY
carbon dioxide when fat is neutralised (vii) Minimise intake of aerated drinks.
in the small intestine. Poor absorption
of carbohydrates in the gut may also Activity 2.3: Investigate types of
cause flatulence. The presence of disorders of the human digestive
excess gas in the digestive system system
causes discomfort and pain that are Material:
lessened when the gas is released either Charts and pamphlets on disorders of
through the mouth or anus.
the human digestive system
Symptoms of flatulence Procedure
(i) Abdominal pain 1. Visit a nearby health facility to

(ii) Constant urge to pass out gas gather information about the
through the anus disorders of the digestive system
(iii) Excessive belching that are commonly encountered.
(iv) Bloating (an accumulation of gas 2. Develop a comprehensive detail

in the stomach) of your study visit.

Prevention and control of flatulence
(i) Avoid foods such as certain pulses Chapter summary
and green vegetables that produce 1. The human digestive system is

gas or eat them in moderate made up of the alimentary canal
amounts. and associated glands and organs
(ii) Those who are intolerant to lactose like the liver and pancreas.
should avoid drinking or eating
milk products. 2. Digestion is the process by which
(iii) Avoid lying down just after eating food is broken down into a simpler
because it makes it easy for gas form that can be absorbed and
to pass from the stomach into the utilised by body cells for carrying
intestines. out various functions like growth,
(iv) Chew foods thoroughly to assist repair of worn out tissues, and
proper digestion of carbohydrates. supply of energy.

58 Student’s Book - Form Two

05/10/2024 15:36:24
BIOLOGY FORM 2 NEW.indd 58 05/10/2024 15:36:24
BIOLOGY FORM 2 NEW.indd 58