Teacher with Little Boy Holding Large Die

Two students sitting at desk in classroom, helping each other with work

Teacher helping female student in classroom

Teacher helping female student in classroom

Teacher helping female student in classroom

Teacher helping female student in classroom

Vintage World War II poster showing two sailors building a ship.

"Two white di, illustration"

Vintage playing card showing two urns and flowers

Two transverse sections of the chest cavity, side by side, showing the changes in structure during breathing.

Illustration showing the cardiac resusitation technique in a newborn or infant by pressing two fingers on the midsternum.

Dizygotic twins showing two placentas, two chorions, and two amnions.

Close-up view of the optical portion of an electron microscope showing two sets of opticals.

Two lateral images of skull showing the muscles used in chewing; (top) masseter muscle and temporal muscle, and (bottom) medial and lateral pterygoid muscles.

Two part illustration showing the more typical anteversion position of the uterus (left) and the less common retroversion position (right).

Antique Anatomical Illustration (copper engraving) showing two views of the skull including jaw detail., Cowper, 1698

Medical illustrations of a mans body showing circulatory system and internal organs

An illustration about book festivals showing a man reading a giant book held up by two women

Two dice showing sixes