sac

The larvae can alter the pH of the sac walls, causing the resilin to expand or contract.

From Science Daily ● Jul. 27, 2026

In a dark room, a doctor pointed to an hourglass shape glowing on the ultrasound screen: There was her amniotic sac, funneling into her dilated cervix, and there was their tiny daughter’s foot, dipping out.

From Salon ● May 27, 2026

Then came the worst part: I passed the amniotic sac.

From The Wall Street Journal ● May 13, 2026

At the inquest on Monday, the court also shown photographs of the area behind a number of houses on the cul de sac.

From BBC ● Jan. 29, 2026

Inside the sac was something that looked like a person, but a person with two heads, with twice as many arms and legs as it should have.

From "Coraline" by Neil Gaiman

Their secret is a remarkably durable system of air sacs that can tolerate far more pressure than researchers expected.

From Science Daily ● Jul. 27, 2026

The walls of the sacs contain resilin, an unusually elastic material found in many insects.

From Science Daily ● Jul. 27, 2026

Caitlin and Grace had been believed to be fraternal twins because they developed in different amniotic sacs, but doctors found their markers were exactly the same while assessing Grace as a potential stem cell donor.

From BBC ● Jul. 1, 2026

In another chapter, Mr. Haskell follows the path of an owlet moth into the cranefly orchid’s flower and lets us watch how sacs of pollen attach themselves to the insect’s eye.

From The Wall Street Journal ● Apr. 17, 2026

This wasn’t too difficult, as the younger boys took one look at the shiny, wrinkled gray sacs and turned away in horror; you couldn’t have paid them to put one in their mouths.

From "The Evolution of Calpurnia Tate" by Jacqueline Kelly