Choose the option which is NOT true about the circulatory system.
It is about 1.7-1.8% of the body weight.
Blood is a fluid connective tissue that circulates through the vascular system; it is red because its red blood cells carry haemoglobin, so calling it a red vascular connective tissue is correct.
An adult human body contains about 5-6 litres of blood, and human RBCs live for about 115-120 days, so these statements are also correct.
Blood makes up about 7-8% of total body weight, not 1.7-1.8%, so that statement is false.
Hence, It is about 1.7-1.8% of the body weight.
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