Question

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Answer 1

Answer:

12. The circulatory system consists of three independent systems that work together: the heart (cardiovascular), lungs (pulmonary), and arteries, veins, coronary and portal vessels (systemic).

13. There are four types of blood groups :

(i) A

(ii) B

(iii) AB

(iv) O

Answer 2

Answer:

V12. Blood vessels and the heart are parts of the circulatory system.

V13. The blood groups are O+, A+, B+, AB+, O-, A-, B-, AB- and Rh. Null (Golden Blood). Golden Blood is so rare, that only less than 50 people in the world have it.