Lesson Notes By Weeks and Term v4 - JHS 3

Lesson Video

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Performance objectives

• Identify at least four types of specialized animal cells.
• Describe the structure and function of each cell type.
• Explain how a cell's structure relates to its function.
• Use resources to find more information on these cells.

Lesson summary

Living things in our homes, farms, and communities (humans, goats, fish, insects, plants) are made of cells. Not all cells are the same. In animals (including humans), some cells become specialised—they develop special shapes and structures to do particular jobs very well. Understanding specialised animal cells helps learners explain everyday issues in Ghana such as wound healing, sickle cell disease, malaria effects on blood, muscle fatigue in sports, pregnancy and fertility, and how the brain controls movement.

Lesson notes

A. Meaning of “Specialised Cell” A specialised cell is a cell that has changed in structure to perform a specific function efficiently. In animals, cells specialise to form tissues (e.g., muscle tissue, nervous tissue, blood). Specialisation happens through cell differentiation (cells develop different structures and roles).

Key idea: > Structure fits function — the shape and parts of a cell help it do its job.

B. Specialised Animal Cells: Structure and Functions

Below are the main specialised animal cells for JHS3:

Evaluation guide

• Observe specialised animal cells such as nerve cells, blood cells,
• muscle cells and sperm cells from pictures, videos and charts and
• identify them by their names and make models to represent their
• shapes. DL 5.3: Ability to find and utilise digital