alveoli

"The two species have some anatomical similarities."

"The building of the bridge will be completed in a couple of weeks."

"The dentist found a small cavity in my tooth. "

"The birds had built an amazing structure out of sticks and various discarded items."

"The city's population is over two millions. "

"He built himself a cabin in a hollow high up in the Rockies."

"My sister goes to the dentist every six months for a checkup and cleaning. "

"The medicine entered her bloodstream quickly and started to reduce her fever. "

"The teacher called out my name during attendance. "

"The museum displayed a beautiful porcelain plaque depicting a family scene. "

"The box contains several important documents. "

"The teacher pointed to the map to show the students where the capital city was located. "