Endocytosis
細胞膜向內凹陷，形成網格蛋包被小窗
\u9ede\u64ca\u7d30\u80de\u819c\u908a\u7de3\u89f8\u767c\u5167\u541e\u4f5c\u7528 \u00b7 Click the cell membrane to trigger endocytosis