capillary
This term evokes the image of an intricate, branching network of microscopic tubes. It suggests a state of extreme delicacy and precision, where the primary function is the intimate exchange of materials between a main system and its surroundings. In a biological sense, it represents the final destination of blood flow where the actual work of nourishment happens. Beyond biology, the word describes a specific type of physical movement driven by surface tension. This creates a feeling of effortless, automatic ascent, such as water climbing up a thin glass tube or ink spreading through a paper towel. It implies a passive but powerful pulling force that defies gravity.
Countable when referring to a single microscopic vessel in the body.
Meanings
A tiny blood vessel that connects arteries to veins.
"The oxygen is exchanged through the capillary walls."
Relating to or resembling a capillary vessel.
"The patient has capillary fragility."
Examples
Oxygen and nutrients pass from the capillary into the surrounding tissue.
The doctor examined the capillary network in the patient's nail bed.