scitable/blog/bio2.0/discovering_new_cell_types_one Discovering new cell types one at a time. An estimation of the number of cells in the human body. Equal numbers of neuronal and nonneuronal cells make the human brain an isometrically scaled-up primate brain. You can learn more about how we ensure our content is accurate and current by reading our editorial policy. Healthline has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical associations. The number they arrived at was 30 trillion. Once they arrived at an estimate of all the different cell types, they added them all together. They used the most up-to-date information available to make a detailed list of volumes and densities in every organ of the body. In the study, researchers went through each cell type and used a variety of tedious methods to estimate the number of each type. A recent study used a man between 20 and 30 years of age, weighing 70 kilograms (154 pounds) and measuring 170 centimeters (5 feet, 7 inches) in height, as a reference. The best we can do is find an estimate based on an average person. On top of that, the actual number of cells will vary from person to person, depending on their age, height, weight, health, and environmental factors. Within the body, some cells are packed more densely, while others are more spread out.Ĭells are constantly dying, and new ones are being made simultaneously. It’s not as simple as figuring out the size or weight of a single cell and making an estimate based on the volume of the human body.Įach of the 200 different types of cells in the human body has a different weight and size. It’s extraordinarily complicated to count human cells. This is, of course, a rough approximation. An average person is estimated to contain roughly 30 trillion human cells, according to recent research.
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