Digestive System: 14-Lecture Ecosystem
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শিক্ষামূলক নোট: এই পৃষ্ঠা একাডেমিক জীববিজ্ঞান শেখা ও পরীক্ষার প্রস্তুতির সহায়ক।
শিক্ষামূলক নোট: এই পৃষ্ঠা একাডেমিক জীববিজ্ঞান শেখা ও পরীক্ষার প্রস্তুতির সহায়ক।
Digestive System: 14-Lecture Ecosystem
HSC Biology 2nd Paper Chapter 3-এর Digestive System series এখানে ১৪টি ধারাবাহিক lecture-এ সাজানো হয়েছে। এই ecosystem structure → secretion → mechanism → absorption → regulation → health → revision—এই logic অনুসরণ করে।
Learning goal: শিক্ষার্থী যেন শুধু অঙ্গের নাম মুখস্থ না করে; বরং food কীভাবে cell-usable nutrient-এ পরিণত হয় তা system-thinking দিয়ে বুঝতে পারে।
Lecture Matrix
01. OverviewDigestive tract, glands, food route, mechanical and chemical digestion.
02. Oral CavityTeeth, tongue, saliva, bolus formation and mouth-phase digestion.
03. Oesophagus and StomachPeristalsis, stomach regions, gastric gland cells and chyme.
04. Liver and BileBile pathway, emulsification, gallbladder and liver metabolism.
05. PancreasMixed gland, pancreatic juice, duodenum and nutrient regulation.
06. Small IntestineDuodenum, jejunum, ileum, villi, microvilli and brush border.
07. Carbohydrate DigestionStarch pathway, amylase group, brush-border enzymes and absorption.
08. Amino Acid PathwayDietary protein pathway, peptide fragments and amino acid absorption.
09. Lipid DigestionBile salts, emulsification, lipase action and lipid transport support.
10. AbsorptionVilli, capillary, lacteal, carbohydrate, amino acid and lipid routes.
11. RegulationNeural and hormonal control, gastrin, secretin, CCK and feedback.
12. Large IntestineWater recovery, colon, rectum, anal canal and defecation reflex.
13. Health IssuesDisease framework, cause, symptom, prevention and learning boundary.
14. Master RevisionComplete system flow, organ map, pathways, CQ and MCQ revision.
Editorial and Exam Alignment
- Native Bangla explanation with scientific English terminology.
- HSC Board CQ pattern and short-answer readiness.
- Constructive sequence: structure first, mechanism next, then absorption and regulation.
- Learning purpose only for health-related content.
- Mobile-friendly card layout; no raw table dependency for the hub.