Blood Cell Collection

Diagram showing bloodstream inside a vein, red, white blood cells, platelet

Diatoms and radiolaria, SEM
Diatoms and radiolaria. Coloured scanning electron micrograph (SEM) of a circular arrangement of various diatoms and radiolaria. Diatoms are planktonic unicellular algae

Kefir bacteria, SEM
Kefir bacteria. Scanning electron micrograph (SEM) of Lactococcus bacteria from kefir, a fermented milk beverage containing beneficial yeast as well as probiotic bacteria

Diagram showing the interaction between female sexual organs and the brain, on one side, the normal reproductive cycle, and on the other, the effect of the contraceptive pill

Blood flow diagram

Cross section of human heart and, bottom left, coronary system with aorta, coronary arteries, coronary vein and blood vessels

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