Use words to express. any number that begins a sentence, title, or text heading. Whenever possible, reword the sentence to avoid beginning with a number. Examples: 1  Ten participants answered the questionnaire.  Forty-eight percent of the sample showed an increase; 2% showed no change.
Transport of oxygen in the blood Blood Blood is an 'aqueous body fluid'. In other words it is water containing a whole range of substances. It is contained in a complex network called the vascular system and is pumped around the body by the heart.
2. Blood Cells. From transporting oxygen throughout the body to fighting infection, cells of the blood are vital to life. The three major types of cells in the blood are red blood cells, white blood cells, and platelets. Red blood cells determine blood type and are also responsible for transporting oxygen to cells.White blood cells are immune system cells that destroy pathogens and provide immunity.. Blood Cells. From transporting oxygen throughout the body to fighting infection, cells of the blood are vital to life. The three major types of cells in the blood are red blood cells, white blood cells, and platelets. Red blood cells determine blood type and are also responsible for transporting oxygen to cells.