Explore Cell Wall, Scanning Electron Micrograph, and more!

Human mesenchymal stem cell

Colored SEM of a human mesenchymal stem cell (MSC). MSCs are multipotent stromal (connective tissue) cells that can differentiate into a variety of cell types, including osteoblasts (bone cells), chondrocytes (cartilage cells), and adipocytes (fat cells).

An infected human cell ruptures, releasing a stream of new viruses (blue) into the system.

The Wars Within

Very devious - The common cold virus, constantly mutates to avoid detection. Just how totally viruses can overcome a healthy host is seen when an infected human cell ruptures, releasing a stream of new viruses (blue) into the system.

Inner ear hair cells, Scanning Electron Microscope. Coloured scanning electron micrograph (SEM) of sensory hair cells from the inner ear. These cells are surrounded by a fluid called endolymph. As sound enters the ear it causes waves to form in the endolymph, which in turn cause the hairs to move. The movement is converted to an electrical signal that is passed on to the brain. Each crescent-shaped arrangement of hairs lies atop a single cell.

SEM of inner ear hair cells. Each crescent-shaped arrangement of hairs lies atop a single cell.

Alstroemeria pollen grains, SEM

Alstroemeria pollen grains, SEM

Micrografía electrónica de barrido coloreada (SEM) de la válvula tricúspide (superior derecha) vista desde el ventrículo derecho del corazón. Las cuerdas del corazón (estructuras filiformes) se conocen como las cuerdas tendinosas, y conectan las válvulas al músculo utilizado para controlar su apertura y cierre. La válvula tricúspide se encuentra entre la aurícula derecha y el ventrículo derecho, lo que ayuda a controlar el flujo de sangre entre las dos cámaras del corazón.

☤ MD ☞☆☆☆ Heart valve and strings, coloured scanning electron micrograph (SEM). This is the tricuspid valve (upper right), seen from the right ventricle of the heart.

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