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THE VISUAL LEARNING STUDIO
See the idea. Understand the connection.
35 visual explanations across 29 chapters, with topic maps throughout the library.
The chapter index will grow as additional notes are prepared. Chapters shown here are a learning collection, not a claim that the entire exam syllabus is complete.
SEE IT. CONNECT IT. EXPLAIN IT.
Understand the chapter visually
3 visual explanations · Study the connections, then test yourself.
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FOLLOW THE PROCESS
The journey of food
1
Mouth
Ingestion, chewing and salivary amylase begin starch digestion.
2
Oesophagus
Peristaltic movement transfers the swallowed bolus.
3
Stomach
Acidic conditions support pepsin activity and protein digestion.
4
Small intestine
Bile and pancreatic/intestinal enzymes support digestion; most nutrient absorption occurs here.
5
Large intestine
Further water and electrolyte absorption and formation of faeces.
6
Rectum → anus
Storage followed by egestion.
The connection Digestion breaks food down; absorption transfers products across the gut wall; assimilation uses absorbed nutrients in cells.
Exam trap Bile emulsifies fat but contains no digestive enzyme. Egestion is not metabolic excretion.
Does absorbed fat always enter blood capillaries directly?
No. Many long-chain lipid products are packaged into chylomicrons and enter intestinal lacteals before reaching the blood.
Study the expanded notes and the credited detailed textbook lessons. The current chapter index covers core topics; it is not a claim of exhaustive coverage of every examination syllabus. Check the official syllabus and primary references.
Human Physiology — lesson overview
Digestion and absorption
Digestion breaks food into forms suitable for absorption; absorption transfers substances across the digestive lining into the body’s internal transport systems.
Carbohydrate digestion begins in the mouth through salivary amylase; stomach acid supports conditions for protein digestion and defence, rather than digesting every nutrient itself.
Bile supports fat emulsification and digestion conditions but is not itself a digestive enzyme. Much nutrient absorption occurs in the small intestine.
Respiration and circulation
Ventilation moves air; gas exchange transfers gases across surfaces; cellular respiration involves metabolic processes releasing usable energy. These are different steps.
Alveoli provide a large exchange surface with a thin barrier and close association with capillaries; diffusion follows partial-pressure gradients.
Human circulation is double circulation: pulmonary and systemic circuits connect heart, lungs and body in a coordinated flow.
Excretion and homeostasis
Kidneys form urine through filtration, selective reabsorption and secretion, regulated according to physiological conditions.
Excretion removes metabolic wastes; egestion removes unabsorbed digestive material. They are not interchangeable terms.
Homeostasis maintains internal variables within workable ranges through regulation, not an absolute unchanging state unaffected by the environment.
