1.

Explain the Blood vascular system.

Answer»

Heart- Special contractile blood pumping organ. 

Blood vessels – Tubes associated with heart into which the blood is pumped and circulated. Artery, Veins and Blood capillaries.

Blood - Fluid connective tissue, consists of a fluid matrix, plasma and formed elements. 

  • Blood is a safer circulating fluid than environmental water because it is not affected by external changes like temperature variation, pollution etc. 
  • Blood contains carrier molecules (haemoglobin, haemocyanin, plasma proteins) that can transport much larger amounts of nutrients and gases than water.



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