| KININ | Any of a group of polypeptides in the blood that cause vasodilation and contraction of smooth muscles, formed in response to injury (5) |
| HISTAMINE | Nitrogenous compound released by body tissues in allergic reactions, causing contraction of smooth muscle and dilation of blood vessels (9) |
| MYCOPLASMA | My company has something in the blood that causes pneumonia, perhaps (10) |
| TRYPSIN | Digestive enzyme secreted by the pancreas that breaks proteins down into polypeptides (7) |
| HEARTBEAT | Breathe erratically before a time of rhythmical expansion and contraction (9) |
| STOPGO | Lights for both in deliberate expansion and contraction policy (4-2) |
| HORMONE | Something in the blood that gets moorhen moving |
| PLATELETS | Cell fragments in the blood that aid clotting |
| SPASMS | Mineral spring with special messaging service and contractions |
| ECONOMICCYCLE | Business world's expansions and contractions |
| VALKYRIE | In Norse mythology, this term refers to any of a group of maidens who served the god Odin and were sent by him to the battlefields to choose the slain who were worthy of a place in Valhalla. |
| ANS | The part of the nervous system of vertebrates that controls involuntary actions of the smooth muscles and heart and glands. |
| MAOI | Any of a group of antidepressant drugs that inhibit the action of monoamine oxidase in the brain and so allow monoamines to accumulate. |
| NONJUROR | Any of a group of clergy in England and Scotland who declined to take the oath of allegiance to William and Mary in 1689 |
| MELANIN | Any of a group of black or dark brown pigments present in the hair, skin and eyes of man and animals (7) |
| AMINOACID | Any of a group of organic compounds that are essential components of the diet (5,4) |
| ENZYME | Any of a group of proteins that are produced by living cells and act as catalysts in specific biochemical reactions |
| FELDSPAR | Any of a group of rock-forming minerals, mainly aluminium silicates, that represent about 60% of the earth's crust (8) |
| CISTRON | Section of a DNA or RNA molecule that encodes a single polypeptide chain, considered a unit of heredity (7) |
| SERA | Watery fluid of the blood that resembles plasma but contains fibrinogen (Plural) (4) |
