Ring and Ball Apparatus with Stand Glass Bottles_BOD Bottles Shows oxygenated and deoxygenated blood

Shows oxygenated and deoxygenated blood paths between heart chambers and alveolar surfaces through seven hand-painted removable parts designed with medical-professional input

8mm inner diameter

Mounted Zener diode on a transparent base with 4mm color-coded sockets and a printed circuit diagram

Demonstrates electromagnetic switching on a base with 4mm plug connections

Steam-sterilizable polypropylene pipette rack holds 12 pipettes horizontally for bench storage and autoclaving in molecular biology laboratories

Ring and Ball Apparatus with Stand Glass Bottles_BOD Bottles Shows oxygenated and deoxygenated bloodStand mounted ring and ball thermal expansion apparatus, dropping freely through the ring when cool but stopped by the ring once flame heating expands the ball.