Fill in the blanks.
i. The blood from the heart is transported to all parts of the body by the _________.
ii. Hemoglobin in present in ______ cells.
iii. Arteries and veins are joined by a network of _____.
iv. The rhythmic expansion and contraction of the heart is called_____.
v. The main excretory product in human beings is ______.
vi. Sweat contains water and ________.
vii. Kidneys eliminate the waste materials in the liquid form called______.
viii. Water reaches great heights in the trees because of suction pull caused by _______.