| Word | Description |
| Heam | Refers to the iron-containing pigment which, in combination with protein, forms the haemoglobin of the red blood cell. (The iron is in the ferrous state). |
| Haematin | Formed by the oxidation of haem, the non-protein part of haemoglobin; the iron gets oxidised from the gerrous to the ferric state. |
| Haemin | Refers to the hydrochloride of haematin which is derived from haemoglobin. The cystals are readily recognisable under the microscope and used as a test for blood. |
| Haemoglobin | Refers to the red colouring matter of the red blood cell, which is compsed of the protein globin, combined with an iron containing pigment, haem. Haemoglobin combines reversibly with oxygen, which it carries from the lungs, to the tissues, and with carbo |
| Haemoglobinometer | An instrument which is used to measure the amount of haemoglobin in blood by direct colorimetry or after conversion to another coloured compound. |
| Haemosiderin | Storage form of iron formed when there is excess available. |
| Hagberg Test | Measure of alpha-amylase activity of flour which is derived from the change in viscosity of flour paste. |
| Haggis | Traditional Scotish dish which is prepared from liver, heart and lungs of sheep, cooked with suet, oatmeal and seasoning, then filled into a bag made from sheep' stomach and boiled for several hours. |
| Half-life | In biochemistry it refers to the time taken for half of the body tissue in question to be replaced. |
| Halibut Liver Oil | One of the riches natural sources of vitamins a and D. It is having 5g vitamin A and 8 mg vitamin D per 100g. |
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