the.com/villi
the gut's shag carpet, unrolled flat enough to cover a tennis court
means Villi are the tiny, finger-like projections lining the small intestine that vastly increase its surface area to soak up nutrients from your food.
from Straight from Latin 'villus,' meaning a tuft of shaggy hair — the same root that gives us 'velvet' through its softer cousins. Anatomists borrowed the word for these microscopic hairy tufts because, under the lens, the gut wall really does look like a plush, shaggy pelt. 'Villi' is simply the plural, keeping its Latin form intact.
- surface trick
- They multiply intestinal absorption area roughly thirtyfold
- tiny tenants
- Each villus wears its own microvilli fringe, the brush border
- constant churn
- Villi cells fully replace themselves every few days
- name origin
- Latin for shaggy hair, fittingly enough
- absorption express
- Each holds a lacteal vessel shuttling dietary fat
small intestine epithelium — finger-like projections in human small intestine that increase surface area by ~30x for nutrient absorption
placental villi — tree-like structures in human placenta that enable maternal-fetal nutrient and gas exchange
chorion villi sampling — prenatal diagnostic test using placental villi to detect genetic abnormalities like down syndrome