09.Description and Characteristics of Eukaryotic Cells.pptx

This chapter describes the main characteristics of Eukariotic cell, the cell structure and components and a class activity.

1. Science

2. Science Lesson #09 – Eukaryotic cells Eukaryotic cells: Are multicellular organisms that have a “nucleus”. Cell structure: Cell wall: The outermost layer that plants , fungi , and bacteria have. It’s a rigid structure that gives support to the cell. Cell membrane: All cells have a membrane. It’s a protective barrier that “encloses” a cell. It separates the cell’s contents from the cell’s environment . It contains proteins, lipids, and phospholipids.

3. Cytoskeleton: a web of proteins in the cytoplasm. It acts as a muscle and a skeleton . It keeps the cell membrane from collapsing. Cytoplasm: The fluid inside the cell. Nucleus: It contains the cell’s DNA , the genetic material . Ribosome: Organelles that make proteins . Endoplasmic reticulum (E.R.): A system of membranes in the cytoplasm where chemical reactions occurs.

4. Mitochondria: The main power source of a cell where sugar is broken down to produce energy . Golgi complex: The organelles that packages and distributes proteins to be transported out of the cells. Vesicle: A small cavity , or sac, that contains substances necessary for the cell. Lysosomes: organelles that contains digestive enzymes that help digest food particles “eliminate” waste and foreign invaders . Vacuoles: Vesicles that “store” water and other liquids Chloroplast: Organelles found in plants and algae cells, in with photosynthesis takes place. Chloroplasts contains chlorophyll, a pigment that gives plants a green color .

5. Cell membrane Vesicle Vacuole

6. Cells are like a house Activity Draw a cell with all the parts you learned today Make an analogy of one part or member or a house with each one the parts of the cell.