4.1 The passage describes the role of the blood transport…
4.1 The passage describes the role of the blood transport system. Read the passage below and fill in the blanks. (10) The blood cells are transported in a straw-coloured liquid called [1]. In this liquid there are [2] blood cells that contain the protein [3] that is used to carry oxygen around the body. The oxygen is used by the body cells in [4] respiration. The gas [5] produced by the cells in respiration is transported to the lungs and is exhaled with water vapour when we breathe out. Other components transported in the plasma are [6] that help the blood to clot following a cut or [7], and white blood cells that are involved in preventing infection. Some of these white blood cells release specific molecules called [8] to destroy bacteria. Other white blood cells called [9] can surround and [10] invading bacteria.
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