Specialised Cells Diagrams IGCSE Biology 0610

Specialised Cells Diagrams: Structure Linked to Function

Biology editorial review is supported by the named review panel. Reviewer participation may vary by guide. Checked against Cambridge IGCSE Biology 0610 (2026–2028); last reviewed August 2026.

Key diagram

Specialised cells have structural adaptations that match their functions. Exam diagrams focus on root hair cells, red blood cells, nerve cells (neurones), sperm cells, palisade cells and ciliated epithelial cells.

Specialised cells are a high-value exam topic because questions always require students to link each structural feature to a specific function. Drawing a specialised cell means showing the adaptation clearly and explaining why it helps the cell carry out its job.

Root hair cell

Draw an elongated rectangular cell with a long, thin projection (the root hair) extending from one side. The long root hair increases the surface area for absorbing water and mineral ions from the soil. The cell has a large permanent vacuole with a low water potential to draw water in by osmosis, and many mitochondria to provide energy for active transport of mineral ions.

Red blood cell

Draw a biconcave disc: a circle that is thinner in the centre than at the edges (shown as a dumbbell shape in side view). Red blood cells have no nucleus, leaving more space for haemoglobin. The biconcave shape increases the surface area to volume ratio for faster oxygen diffusion. They are small and flexible, allowing them to squeeze through narrow capillaries.

Sperm cell and ciliated epithelial cell

The sperm cell has a streamlined head containing the nucleus and an acrosome with enzymes to penetrate the egg. A long tail (flagellum) propels it, and many mitochondria in the middle piece provide energy. Draw an oval head, a short middle section and a long thin tail.

The ciliated epithelial cell has tiny hair-like cilia on its upper surface that beat in a wave to move mucus along airways. Draw a column-shaped cell with short lines along the top edge representing cilia.

How to answer structure-function questions

Use the formula: name the structural feature, then explain the advantage it provides. For example: "The red blood cell has no nucleus, which provides more space for haemoglobin, increasing the amount of oxygen the cell can carry." Each point must contain both the feature and the function: stating only one earns zero marks.

Label checklist

Check these labels are present and correctly positioned before finishing your drawing.

✓ Root hair (long projection)
✓ Large permanent vacuole (root hair cell)
✓ Biconcave shape (red blood cell)
✓ No nucleus (red blood cell)
✓ Tail / flagellum (sperm cell)
✓ Acrosome (sperm cell)
✓ Mitochondria (middle piece of sperm)
✓ Cilia (ciliated epithelial cell)

Try a diagram question (4 marks)

Explain two ways in which a red blood cell is adapted for its function. [4]

Show the answer and marking guidance

It has no nucleus, which gives more room for haemoglobin to carry oxygen.
It has a biconcave disc shape, which increases the surface area to volume ratio for faster oxygen diffusion.

Original Cambridge-style practice written for this site.

Common diagram mistakes

Check these against your own drawing before moving on.

Stating the adaptation without linking it to a function.
Drawing a red blood cell with a nucleus.
Confusing cilia with flagella: cilia are many short projections, a flagellum is one long tail.
Forgetting to mention mitochondria when explaining active transport in root hair cells.