给我详细的图解讲一下细胞结构的知识点。---**Image Description:** The image contains two diagrams illustrating biological cells. The top diagram depicts a plant cell, and the bottom diagram depicts an animal cell. Both diagrams show various cellular components labeled with Chinese characters. **Diagram 1 (Top - Plant Cell):** * **Type:** Biological cell diagram (Plant Cell). * **Shape:** Roughly hexagonal, indicating the presence of a rigid cell wall. * **Main Elements & Labels:** * **细胞壁 (Cell Wall):** The outermost thick boundary of the cell. * **细胞膜 (Cell Membrane):** The membrane located just inside the cell wall. * **叶绿体 (Chloroplast):** Small oval-shaped green organelles distributed within the cytoplasm. * **细胞核 (Nucleus):** A prominent, roughly spherical, dark brown organelle located towards one side of the cell. * **液泡 (Vacuole):** A very large, centrally located, irregular-shaped vacuole occupying a significant volume of the cell. * **细胞质 (Cytoplasm):** The jelly-like substance filling the space between the cell membrane, nucleus, vacuole, and chloroplasts. **Diagram 2 (Bottom - Animal Cell):** * **Type:** Biological cell diagram (Animal Cell). * **Shape:** Roughly oval or rounded, lacking a rigid outer wall. * **Main Elements & Labels:** * **细胞膜 (Cell Membrane):** The outermost boundary of the cell. * **细胞核 (Nucleus):** A prominent, roughly spherical, centrally located organelle. * **细胞质 (Cytoplasm):** The jelly-like substance filling the space within the cell membrane and surrounding the nucleus.