Scope
Only 12.3 A–C in the supplied document. Sections 12.1, 12.2 and later 12.3 sections are excluded. Existing source tabs and pictures are preserved.
Sources, corrections and unclear text record
Source status
The supplied document contains summaries and previously generated pictures rather than a complete paginated textbook scan. Source locations use tab names; printed page numbers are not invented.
B2 route gap
The source text has a blank route after its route heading. The source labelled picture supplies mouth, oesophagus, stomach, small and large intestines, anus. The route is reconstructed; rectum is added explicitly as the terminal large-intestinal region, checked against NIDDK.
A absorption qualification
The source says digestion products enter blood directly. This is a simplified account; much absorbed fat reaches blood through lymph first. The learning note avoids saying every nutrient goes directly into blood.
A/C2 terminology
Minerals are called mineral ions, rather than describing every listed substance as a molecule. This is a scientific wording clarification.
B3 secretions
The source generalises that digestive juices contain enzymes. This is qualified: enzyme-containing secretions carry out chemical digestion; bile is a secretion but not an enzyme.
Source picture errors
One B mechanical/chemical picture shows a pancreas-like drawing labelled salivary gland, and a general-plan picture can suggest absorption from the stomach. New diagrams distinguish glands correctly and show the intestinal lining for the A absorption principle.
C3 wisdom teeth
Removal is phrased as may be needed after dental assessment, not inevitable. Source age and root patterns are presented as typical textbook ranges.
C4 dental formula
Adult 2.1.2.3 per quadrant and complete total 32 are read from the source English PIC. Milk 2.1.0.2 and 20 are explained by calculation, not claimed as a newly recovered quotation.
C6 review interval
Source annual-check language is distinguished from an individual recommendation; NHS describes risk-based intervals.
New material
All exercise scenarios, model observations and datasets are newly authored educational examples. They are not personal diagnoses or actual class experimental results.