Animal Cell Structure and Function

Introduction

• Objective: Label a diagram of an animal cell and describe the functions of different parts.
• Note: Detailed study on cell functions will be covered in later topics.

Overview of Animal Cells

• Ukar (Eukaryotic) Cells:
  • Genetic material (DNA) enclosed in a nucleus.
• Example Image: Human cancer cells under a light microscope.

Key Components of an Animal Cell

1. Nucleus

• Function: Encloses genetic material (DNA).
• Color Note: Nuclei are sometimes stained blue for visibility, but are not naturally this color.

2. Cytoplasm

• Description: Watery solution inside the cell.
• Function: Site of chemical reactions, e.g., first stage of respiration.

3. Cell Membrane

• Function: Encloses the cell; controls entry and exit of molecules.

4. Mitochondria

• Visibility: Too small to be seen with a light microscope; visible with staining.
• Function: Site of aerobic respiration.
• Additional Note: Respiration will be covered in more detail in future lessons.

5. Ribosomes

• Visibility: Extremely small; visible only with an electron microscope.
• Function: Site of protein synthesis.
• Importance: Proteins perform various functions, e.g., enzymes.

Exam Preparation

• Diagram Identification: Be prepared to identify structures such as nucleus, cytoplasm, cell membrane, mitochondria, and ribosomes from diagrams.
• Study Resource: Find questions on animal cell structure in the revision workbook for practice.

Conclusion

• Learning Outcome: You should now be able to label a diagram of an animal cell and describe the functions of its parts.