Human Biology (ATAR): should I choose it?

What will I learn?

How will I be assessed?

Progression and companion subjects

No complete companion or exclusion review is attached to this profile. Check the official course-entry conditions, language eligibility and your school’s sequence before enrolling. Links between resource hubs show related learning; they do not establish a compulsory prerequisite.

Will I find it hard?

Difficulty depends on your experience, interests, teaching and assessment. These are our reflection prompts, not an official difficulty rating.

• Look at how much data, calculation and graph interpretation appear in the sample for this particular science.
• Can you explain the ideas in your own words as well as recall the terminology?
• Do investigations and evaluating evidence interest you? Check the course’s practical requirements.

Does it scale up or down?

Human Biology, 2025. TISC’s mean scaled scores summarise all students with a scaled score in the published course. The mean describes a cohort and gives no individual raw-to-scaled conversion. A scaled mean alone cannot establish whether this subject scaled up or down. Historical cohort data cannot predict your result or a future scaling direction.

Scaling is not a measure of difficulty or a guaranteed bonus. Prioritise content you can engage with and required subjects for courses you are considering.

Try a little of the subject

Cells and tissues

The human body is built in levels. Atoms form molecules, molecules form organelles, organelles work together inside cells , similar cells and their surrounding material form tissues , two or more tissues combine into an organ , and organs that cooperate form an organ system . No system works alone: the respiratory system supplies oxygen that the circulatory system delivers, the digestive system supplies nutrients, and the excretory system removes wastes. Together they keep the internal environment suitable for every cell. Inside each cell, membrane-bound and non-membrane-bound organelles divide up the work. The nucleus holds DNA and directs protein production. Ribosomes , free in the cytosol or attached to rough endoplasmic reticulum , assemble proteins. The smooth endoplasmic reticulum makes lipids and helps detoxify some substances. The Golgi body modifies, sorts and packages proteins into vesicles. Mitochondria carry out the aerobic stages of cellular respiration and release most of the cell's usable energy as ATP. Lysosomes contain digestive enzymes that break down worn-out organelles and engulfed material. The cytoskeleton gives shape and allows movement of organelles, and centrioles help organise the microtubules that separate chromosomes during division. These processes only continue if the cell is supplied with raw materials (oxygen, glucose, amino acids, fatty acids, water, ions) and if wastes such as carbon dioxide, excess heat and nitrogenous compounds are removed. If wastes accumulate, pH and other conditions drift and enzymes work less efficiently. This is why exchange at the cell membrane is so important. Worked example. A pancreatic cell secretes a digestive enzyme. Trace the enzyme. The gene is read in the nucleus ; the protein is built on ribosomes of t

Original practice question: Which organelle assembles amino acids into polypeptides?

This is ATARMAxxing’s original sample learning material. It is not an official assessment task or a prediction of your school’s workload.

Explore the resources

Open the Human Biology (ATAR) subject hub and free preview (opens in a new tab)

• Human Biology — WACE Year 12 ATAR (opens in a new tab)

Core subject information and planning are free. Full study resources are optional.