Blood is the principal medium in the transport process, Its colour is a red viscous liquid, PH equals 7.4 (weak alkaline), and Volume is 5 – 6 liters of blood on average, The structure...
Animals obtain their requirements of energy in the form of food, after its digestion, the soluble food substances are absorbed, but still remains the problem of their transport and distribution to the various tissues...
The blood flows inside the body through a network of blood vessels, So, they are the paths of the blood throughout the body, The types of the blood vessels are the arteries, the veins,...
