386K views · 7.7K reactions | The Gram Stain is a microbiology technique used to classify bacteria into two large groups: Gram-positive (purple) and Gram-negative (pink), based on the structure of their cell walls. This technique was developed approximately 80 years before the invention of the electron microscope allowed scientists to visually confirm the underlying cell wall differences that cause the stain variation. | Ribosome Studio | Facebook

This biomedical 3D animation shows the plasma membrane. It's a semipermeable membrane that separates the cytoplasm from the extracellular space. The cell membrane is also involved in cell adhesion and cell signaling. From "The Molecular Interactions of the MAPK Pathway" https://youtu.be/6xsBl9sSkBg | Ribosome Studio

61K views · 1.1K reactions | In the small intestine. The primary function of the small intestine is the absorption of nutrients and minerals using small finger-like protrusions called villi. | Ribosome Studio | Facebook