Match the following options.

A. Haemolymph (i) Immuntiy
B. R.B.C. (ii) Coagulation
C. Antibody (iii) Cockroach
D. Antibody (iv) astr ansport
E. systole (v) Contraction

A.

Haemolymph

(i)

Cockroach

B.

R.B.C.

(ii)

astr ansport

C.

Antibody

(iii)

Immuntiy

D.

Antibody

(iv)

Coagulation

E.

systole

(v)

Contraction

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Name a animal having open circulatory system.


Cockroach

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How many times does a heart beat per minute?


72 times.

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Which is the largest vein?


Inferior vena cava.

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What does the QRS wave represent in an ECG?


Depolarisation of the ventricles.

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