Science Helpdesk

Digestion.To understand the human digestive system, with emphasis on balanced diet and information on enzymes. Interactive lesson at Skoool.co.uk.

New KS4 topics: Digestion.Great series of animated lessons at Skoool.co.uk about digestion, balanced diet, malnutrition, food experiments and more.

The digestive system.Great presentation on the groups of foods, chemical tests for nutrients, recommended daily intakes, the functions of the organs of the digestive system, digestive enzymes, healthy diets and more.

The digestive system at Web-books.com.A good overview, with text and images, on all the organs of the digestive system and their work. The left menu contains a link to a wide series of digestive diseases.

The digestive system at Faqs.org.Another wide overview, with text and images, on all the organs of the digestive system and their work, the digestive diseases, a glossary and additional readings.

Digestive system at Hillendale Health.Some basic and important facts about the digestive process.

The digestive system.To dig deeper, visit this website with lots of info and images on the digestive system.

Digestion time of foods.Do you know how long takes an apple to be digested?

We are more microbe than man.About a 90% of your cells are not yours: they are bacteria, most of which live in your intestines. Learn why. You can also listen to the embedded audio version of the article.

Why does my stomach growl?Whether you call it grumbling, rumbling, gurgling or growling, from time to time everybody's belly chimes in. Learn why.

Why do we have an appendix?This is about Mankind's evolutive past.

Cooking and cognition: how humans got so smart.Learn how cooking improved our digestive efficiency and spurted our brain development.

Breathing and respiration.To understand the human breathing system, with emphasis on the structure of the lungs and the gaseous exchanges involving oxygen and carbon dioxide. Interactive lesson at Skoool.co.uk.

New KS4 topics: Breathing and respiration.Great series of animated lessons at Skoool.co.uk about breathing, respiration, gas exchange, inhaled and exhaled air and more.

Breathing.Simple activity where you can drag the diaphragn up and down to watch the respiratory movements.

Breathing.Simple animation showing how and why air enters and leaves the lungs.

Alveoli.Simple animation showing the gas exchange in the alveoli.

The respiratory system.Great presentation on the respiratory organs, the breathing cycle, inhaled and exhaled air, gas exchange, the role of haemoglobin, oxygen and cellular respiration, smoking, asthma and more.

How your lungs work.Detailed description of the breathing process in humans. With images and animations that start on page load… you might want to stop and restart them after reading the texts.

The respiratory system at Web-books.com.A good overview, with text and images, on all the organs of the respiratory system and their work. The left menu contains a link to a wide series of respiratory diseases.

The respiratory system at Faqs.org.Another wide overview, with text and images, on all the organs of the respiratory system and their functions, the respiratory disorders, a glossary and additional readings.

Respiratory system at Hillendale Health.Some basic and important facts about the respiratory system.

The respiratory system.To dig deeper, visit this website with lots of info and images on the respiratory system.

Blood and circulation.To understand the human circulatory system, with a detailed analysis of the constituents of blood and their different functions. Interactive lesson at Skoool.co.uk.

New KS4 topics: Blood and circulation.Great series of animated lessons at Skoool.co.uk about the components of blood, the role of blood, the circulatory system, defense mechanisms and more.

The circulatory system.Great presentation on the cardiovascular system organs and their functions, blood as a tissue, oxygen transport, clotting, the role of white blood cells and healthy cardiovascular habits.

Heart disease and circulation.Learn the basics of the circulatory system from BBC Bitesize. You can take the revision test here and even try an interactive activity.

The cardiovascular system at Web-books.com.A good overview, with text and images, on all the organs of the circulatory system and their work. The left menu contains a link to a wide series of cardiovascular diseases.

The blood at Web-books.com.A good overview on the blood, its cells and their work. The left menu contains a link to a wide series of blood diseases.

The cardiovascular system at Faqs.org.Another wide overview, with text and images, on all the organs of the circulatory system and their work, the blood, the cardiovascular disorders, a glossary and additional readings.

How blood works.Detailed description of the composition and the function of the human blood. It contains two animations that start on page load… you might want to stop and restart them after reading the texts.

How your heart works.Detailed description of the structure and the function of the human heart. It contains very good images and one animation that starts on page load… you might want to stop and restart it after reading the texts.

How heart disease works.Detailed description of what a heart attack and some other heart-related diseases are. With good images and one animation.

Circulatory system at Hillendale Health.Some basic and important facts about the circulatory system.

The circulatory system.To dig deeper, visit this website with lots of info and images on the circulatory system.

Blood clotting.Simple and clear animation showing how a clot is formed in a wound from platelets, protein fibers and blood cells.

Hybrid interactive heart.3D medical animation that shows the heart by the outside and the inside.

Heart pictures.A set of eight photos related to the heart and its working.

Circulatory system matching activty.An interactive test to help you review the main concepts about your circulatory system.

Label the heart.Drag and drop labelling activity of the main parts of the heart.

How your kidneys work.Detailed description of the structure and function of human kidneys. With very good images.

The urinary system at Web-books.com.A good overview, with text and images, on all the organs of the urinary system and their work. The left menu contains a link to a wide series of urinary diseases.

The urinary system at Faqs.org.Another wide overview, with text and images, on all the organs of the urinary system and their functions, the urinary diseases, a glossary and additional readings.

The excretory system.To dig deeper, visit this website with lots of info and images on the excretory system.

Kidney.Simple animation showing the location of a nephron in the kidney and its function.

KEWL - Healthy eating.Basic introduction to the food groups, the food pyramid, balanced diets and food labels.

Food and health.Learn the basics on food safety from BBC Bitesize. You can take the revision test here and even try an interactive activity.

Nutrition at Faqs.org.A wide overview, with text and images, on food groups, nutrients, dietary habits, diets, eating disorders, a glossary and additional readings.

How food works.A lot of interesting and detailed info about the main human nutrients. It contains some images and one animation that starts on page load… you might want to stop and restart it after reading the texts.

How to calculate how many calories you need to eat to lose weight?The key to fat loss is first figuring out how many calories you should be taking in each day. Learn how.

How food preservation works.Freezing, canning, salting… Detailed info on these and other commonly used food preservation techniques.

Food groups.Simple interactive activity to check what is the main type of nutrient obtained from each food group.

Health challenge.An interactive test to help you review the main concepts about nutrients and nutrition. Essential.

Read it before you eat it!An interactive test to help you understand the nutritonal facts labels found on foods. Very interesting.

Snake oil?Excellent chart showing how much scientific evidence there is for popular health supplements.

Eating veggies shrinks the brain.Something to be aware of if you're considering becoming a vegetarian…

What happens to your body if you drink a coke right now?Drinking a coke… not as healthy as you probably thought.

Foods that heal.An amazing chart of foods that will make your life longer and healthier.

Healing food reference.A website meant to empower consumers with information about the healing power of foods.