Category Archives: 6. Human Physiology

6.1 Digestion & Absorption

BioKnowledgy Presentation on 6.1 Digestion and absorption from Chris Paine 

A fantastic animated tutorial from McGraw Hill Education on the Organs of Digestion & one on the action of Sucrase.

How to draw and label a diagram of the digestive system – a video from Stephanie Castle (you need to be able to annotate this diagram).

Mr Paul Andersen (from Bozeman High) details The Digestive System in a 9m 38s tutorial:

In Crash Course Biology #28 – The Digestive System, Hank takes us through the bowels of the human digestive system and explains why it’s all about surface area.

6.2 The Blood System

BioKnowledgy Presentation on 6.2 The blood system from Chris Paine


How to draw the heart: 6.2.1 Heart Structure, a video from Stephanie Castle or heart diagram v2, a video from David Faure. Here is Mr W’s musical quiz on the Heart.

6.2.2 Coronary Arteries a video from Stephanie Castle.


Blood flow through the heart, a 1m 50s video or How the Heart Works 3D Video, a 3m video. A fantastic animated tutorial from McGraw Hill Education on the cardiac cycle. and here’s an animated, narrated tutorial on blood flow through the human heart (from Sinauer Associates).

The conducting system of the heart, another animated tutorial from McGraw Hill Education.

A tutorial on the cardiac cycle from Utah University.


Contents of Blood, a 9m video and 6.2.5 Relationship between structure and function of arteries, veins and capillaries, a 3m video from Stephanie Castle.

William Harvey  Misunderstood Geniuses, a 5m video.

Paul Andersen surveys The Circulatory System in humans in an 11m 35s tutorial.

In Crash Course Biology #27 – Circulatory & Respiratory Systems, Hank takes us on a trip around the body – we follow the circulatory and respiratory systems.

Mr W’s Circulatory System rap. How bones make blood, 4m 42s video from TED-Ed.

6.3 Defence against Infectious Disease

BioKnowledgy Presentation on 6.3 defense against infectious disease from Chris Paine

In Crash Course Biology #32 – Your Immune System: Natural Born Killer, Hank tells us about the team of deadly ninja assassins that is tasked with protecting our bodies from all the bad guys that want to kill us – also known as our immune system.


The Germ Theory – a 4m 39s TEDEd lesson.

Virus trading cards from Tabletop Whale.


How does blood clot – a 2m video from eMedTV. – and here the process of blood clotting. Here is a game on Blood clotting factors.


Phagocytosis videos: here and here


Antibody production – a 1m video.


Antibiotics – seven wonders of the microbe world – 4m 30s video. Penicillin – the magic bullet (a 3m video), and here is the Rise of the Superbug – Antibiotic-Resistant Bacteria: Dr. Karl Klose. The wonder drug – an old video.

Antibotics don’t work on viruses. Here is how a virus invades a cell in Flu Attack!


HIV and AIDS, a 7m video. Fantastic animated tutorials from McGraw Hill Education – HIV replication (how a retrovirus replicates) & how the HIV infection cycle works. Why it’s so hard to cure HIV/AIDS (a TED-Ed lesson).

Mr W sings I’m a Virus!:

6.4 Gas Exchange

BioKnowledgy Presentation on 6.4 Gas exchange from Chris Paine

Some past paper questions answered by IB Blueprint: Gas Exchange – Exam Paper 1 QuestionsGas Exchange – Paper 2 Questions.

Fantastic animated tutorials from McGraw Hill Education – alveolar pressure changes during breathing & gas exchange during respiration (breathing).

What happens during VENTILATION (breathing) explained here 6.4.5 Explain mechanism of ventilation from Stephanie Castle (2m vid).

How do the Lungs work? – a three and a half minute lesson from TED-Ed:

And here is another TED-Ed lesson: Oxygen’s surprisingly complex journey through your body.

Paul Andersen describes The Respiratory System in an 8m 46s tutorial.

In Crash Course Biology #27 – Circulatory & Respiratory Systems, Hank takes us on a trip around the body – we follow the circulatory and respiratory systems.

An animated guide to breathing from Tabletop Whale.


Monitoring of ventilation in humans at rest and after mild and vigorous exercise

Spirometry – notes from BioNinja

6.5 Neurons & Synapses

BioKnowledgy Presentation on 6.5 Neurons and synapses from Chris Paine

6.5 Neurons & Synapses notes to complete (created by Mrs Green).

IB Bio Topic 6.5 Pt A Neurons a 4m video lesson and IB Bio Topic 6.5 Pt B Neurons another 4m video lesson, from roxprice.

How do Nerves Carry Information? a 6m40s lesson from Naked Science Scrapbook.

In Crash Course Biology #26 – The Nervous System, Hank begins a series of videos on organ systems with a look at the nervous system and all of the things that it is responsible for in the body.

Fantastic animated tutorials from McGraw Hill Education – the Nerve Impulse, Action Potential propagation in unmyelinated axons, Voltage-gated channels &  the action potential, Sodium-Potassium exchange pump,  how it works & transmission across a synapse

From Sinauer Associates we have an animated, narrated tutorial on Reflex Arcs which also includes a quiz and here are animated, narrated tutorials on the synapse and action potentials.




Lovely infographic – just click on it to enlarge.




How fast are your reactions? ReactionTimesLab. Test your reactions with stoplight. Here is the classic ruler drop method: instructions and how to make your own reaction timer.

6.6 Hormones, Homeostasis & Reproduction

BioKnowledgy presentation on 6.6 hormones homeostasis and reproduction from Chris Paine

6.6 Hormones, Homeo & Repro notes to complete (created by Mrs Green).

IB Biology 6.6 notes – Cheryl Haus talks us through the topic while making notes in a 1 hour video.

Some past paper questions answered by IB Blueprint: Nerves, hormones and homeostasis – Paper 1 Questions ; Nerves, hormones and homeostasis – Paper 2Reproduction – Paper 1 QuestionsReproduction – Paper 2 Questions.


Crash Course Biology #33: Great Glands – Your Endocrine System (11m). Hank also does Endocrine System, part 1 – Glands & Hormones (Crash Course A&P #23) in 10m 24s and part 2, Hormone Cascades (Crash Course A&P #24) in 9m 33s.

The Endocrine system explained in under 4 minutes – a nice introductory video – or here is a 5m video The Endocrine System in more detail than you need or Mr Andersesn’s The Endocrine System in 13m 47s.


Positive & negative feedback loops, a 14m video lesson from Mr Andersen, who also teaches us elements of a feedback loop in 9 minutes.

‘What does the Pancreas do?’ (from Emma Bryce & TED-Ed):


How menstruation works and Why do women have periods? – 2 videos from TEDEd.

Animated, narrated tutorial on the menstrual cycle from Sinauer Associates; there’s also an animated, narrated tutorial on IVF.

In Crash Course Biology #34 – The Reproductive System: How Gonads Go, Hank lets us in on the meaning of life, at least from a biological perspective – it’s reproduction.

The physics of sperm vs. the physics of sperm whales from TED-Ed.