| A | B |
|---|
| Red blood cells | Cells which carry oxygen |
| White blood cells | Cells which fight disease |
| Platelets | Help blood to clot |
| Plasma | Carries carbon dioxide, glucose and urea |
| Amino acids | Dissolved in plasma and used to make proteins |
| Glucose | Dissolved in the plasma. A good energy source |
| Straw coloured | The colour of plasma |
| Hormones | Carried from endocrine glands to target organs |
| Bacteria | Kept out of the blood by a clot |
| Antibodies | Proteins made by white blood cells to attack bacteria |
| Engulf | What white blood cells do to bacteria before digesting them |
| Digest | What white blood cells do to bacteria after engulfing them |
| Clot | Platelets and red blood cells caught in a network of protein fibres |
| Microbes | Bacteria and fungi |
| Urea | The waste product you get when proteins are broken down |
| Haemoglobin | Fills the red blood cell |
| Nucleus | Missing from red blood cells to make room for haemoglobin |
| Oxyhaemoglobin | What we call haemoglobin combined with oxygen |
| Biconcave disc | The shape of red blood cells |
| Surface area | Very large in red blood cells when compared with their volume. |
