Question

Y ONE from internal choice of each
3. Each question carries FOUR marks.
ain about the experiment donein your school to prove that
(OR)
ribe the pathway of air in respiration of humans with the
in the sequential events in the cardiac cycle
(OR)
the structural functional unit of human excretory systen
ate the various parts of human brain with its function
(OR)
neatlabelled diaram of human mo​

Answer 1

Explanation:

Pathway of air: nasal cavities (or oral cavity) > pharynx > trachea > primary bronchi (right & left) > secondary bronchi > tertiary bronchi > bronchioles > alveoli (site of gas exchange