Assertion             :       In mollusca, circulatory system is of closed type.

Reason               :       The blood of mollusca contains haemoglobin

Assertion  :       Histamine is involved in allergic and inflammatory reactions.

Reason     :       Histamine is a vasodilator

Assertion   :       Cardiac output rises during exercise.

Reason      :       Cardiac output helps in less oxygen consumption.

Assertion    :       EEG is of immense diagnostic value in the cardiac diseases.

Reason      :       Defects in cardiac functions can be reflected in changes in the pattern of electrical potentials recorded in the EEG. 

Assertion: Electrocardiogram is record or electrical activity of the heart which shows certain waves called P, Q, R, S and T waves.

Reason: It gives important information concerning the spread of excitation to the different parts of heart and it is of value in the diagnosis of cases of abnormal cardiac rhythm and myocardial damage.

Assertion   :       Total count of RBC comes out to be very low in polycythemia.

Reason      :       Number of erythrocytes get reduced in the condition of polycythemia.

Assertion   :       Serum can not be coagulated.

Reason      :       Serum lacks the protein fibrinogen.