A drop of blood: The Hidden Science, Chemistry and Information Inside Us

A Drop of BloodThe Hidden Science, Chemistry and Information Inside UsWe see blood every day, yet most of us rarely stop to think about what it actually contains.A single drop carries an extraordinary amount of information about the body. Within it are red blood cells transporting oxygen, proteins carrying molecules, hormones delivering signals, enzymes revealing cellular activity, antibodies recognising foreign substances and countless chemical reactions keeping us alive.A Drop of Blood takes the reader on a journey from the visible to the microscopic, exploring what blood is, how laboratories turn a sample into measurable results, and how those results can reveal what is happening inside the body.From cells and plasma to enzymes, antibodies, inflammation, biomarkers, DNA and disease, this book explains the science behind blood testing in a clear and accessible way. It explores how a number can become a clue, how molecules can reveal changes in organs we cannot directly see, and how the immune system uses molecular recognition to protect us.But this is not simply a book about blood tests.It is about information.Because behind every laboratory result is a molecule. Behind every molecule is a biological process. And behind every biological process is a living body constantly changing, adapting and communicating.A drop of blood may be small.What it can tell us is anything but.