The GI tract is considered to be the tube starting from the mouth and the esophagus, where it has only a transport role. Digestion then begins in the stomach and continues in the small intestine to ...
Three-dimensional model of a representative area from the tip region of a growing Lilium ‘Siberia’ pollen tube. Cyan, secretory vesicles (SVs); purple, electron-dense vesicles (DVs); orange, ...
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