Fill in the blanks.
(i) The blood from the heart is transported to all parts of the body by the ___________.
(ii) Haemoglobin is 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 ___________.