03/12/2025
📘HIM216 HUMAN ANATOMY AND PHYSIOLOGY II
INTERNAL ORGANS AND SYSTEMS
PROGRAMME: HEALTH INFORMATION MANAGEMENT PROFESSIONAL DIPLOMA
SEMESTER: YEAR TWO SEMESTER ONE
LECTURE FOUR
PROCESS OF DIGESTION AND ABSORPTION
INTRODUCTION
Digestion and absorption are essential activities that help the body use food for energy growth and repair.
Example: After eating rice, your body breaks it down to produce strength, help you grow, and repair tissues.
Narkewar abinci da shanye gina jiki muhimman ayyuka ne da suke taimakawa jiki ya yi amfani da abinci domin ƙarfi girma da gyara.
Misali: Bayan cin doya ko kosai, jiki yana amfani da shi domin ƙarfi da sabunta sassa.
Digestion is the process that breaks food into smaller parts while absorption is the movement of nutrients from the intestine into the blood and lymph.
Example: When you chew and swallow food, digestion breaks it down, and absorption moves the nutrients into your blood.
Narkewa ita ce hanya da jiki ke karya abinci zuwa ƙananan sassa yayin da shanye gina jiki ke nufin motsawar sinadaran abinci daga hanji zuwa jini da lymph.
Misali: Doya da aka narke a ciki, gina jikin ta wuce zuwa jini domin amfani.
Understanding how digestion and absorption work helps health information students interpret medical records on gastrointestinal diseases which are common in Nigeria and across the world.
Example: When reading a patient’s file with stomach ulcer, you understand what part of digestion is affected.
Fahimtar yadda narkewa da shanye gina jiki ke aiki yana taimakawa ɗaliban Health Information su fassara bayanan lafiya na cututtukan hanji da ciki waɗanda ake yawan samu a Najeriya da sauran duniya.
Misali: Idan ka ga rahoton gudawa ko typhoid, ka san sashen da matsalar ta faru.
DEFINITION OF TERMS
Digestion is the breakdown of food into simple substances the body can use.
Example: Swallow becomes soft and watery so your body can use it.
Narkewa na nufin karya abinci zuwa sauƙaƙan sinadarai da jiki zai iya amfani da su.
Misali: Abinci yana zama k**ar ruwa don jiki ya iya amfani da shi.
Absorption is the movement of nutrients from the digestive tract into the blood or lymph.
Example: After digestion, nutrients enter your blood like water entering a sponge.
Shanye gina jiki yana nufin motsa sinadaran abinci daga hanji zuwa jini ko lymph.
Misali: Gina jikin abinci yana shiga jini k**ar ruwan shayi.
Enzymes are substances that speed up the breakdown of food.
Example: Enzymes act like scissors cutting the food faster.
Enzymes su ne abubuwan da suke hanzarta narkewar abinci.
Misali: Enzymes k**ar wuka suna taimakawa abinci ya narke da sauri.
Chyme is the semi liquid mixture of food formed in the stomach.
Example: When food leaves the stomach, it looks like thick pap (kunu).
Chyme shi ne cakudadden abinci mai laushi wanda ke fitowa daga ciki bayan an narke shi.
Misali: Yana k**a da kunu mai kauri.
Villi are small finger like projections in the small intestine that help in absorption.
Example: They look like tiny fingers that collect food nutrients into the blood.
Villi ƙananan ɗan yatsan sassa ne a cikin hanji ƙarami da suke taimakawa wajen shanye gina jiki.
Misali: Kamar yatsun roba suna tsotsa sinadaran abinci.
MECHANISM OF DIGESTION
Digestion begins in the mouth and ends in the large intestine.
Example: From chewing food to forming stool, digestion takes place step by step.
Narkewa tana farawa a baki kuma tana ƙarewa a hanji babba.
Misali: Tauna abinci shine farko, yin bayan gida shine ƙarshe.
Every region of the digestive system performs a specific task to ensure that nutrients are released and prepared for absorption.
Example: Teeth grind, stomach mixes, and small intestine absorbs.
Kowane sashe na tsarin narkewar abinci yana da aikinsa domin tabbatar da cewa an fitar da sinadarai kuma an shirya su don shanyewa.
Misali: Baki yana karya abinci, ciki yana gauraya shi, hanji yana tsotsa gina jiki.
DIGESTION IN THE MOUTH
The mouth starts digestion through chewing and saliva.
Example: When chewing bread, saliva softens it.
Baki yana fara narkewa ta hanyar tauna da kumfa.
Misali: Kumfa yana taimaka abinci ya yi laushi.
The teeth crush food into smaller particles while saliva moistens it and contains enzymes that begin carbohydrate digestion.
Example: Chewing garri or biscuit breaks it into small pieces.
Hakuransu suna murƙushe abinci zuwa ƙananan sassa yayin da kumfa ke jiƙa shi kuma tana ɗauke da enzymes da ke fara narkar da carbohydrates.
Misali: Shinkafa tana yin zaƙi saboda starch yana narke.
Example When you chew yam or rice it becomes softer and slightly sweet because starch begins to break down in the mouth.
Simple example: Chewing rice feels sweet.
Misali Lokacin da ka tauna doya ko shinkafa suna yin laushi kuma suna ɗan yin zaƙi saboda starch yana fara narkewa a cikin baki.
DIGESTION IN THE STOMACH
The stomach continues digestion by mixing food with gastric juice which contains acid and enzymes that break down proteins.
Example: Meat becomes soft in the stomach because acid breaks it down.
Ciki yana ci gaba da narkewa ta hanyar haɗa abinci da gastric juice wanda yake ɗauke da acid da enzymes masu karya proteins.
Misali: Nama mai wuya yana laushi a ciki.
The strong muscular contractions of the stomach help to churn the food into chyme.
Example: The stomach acts like a blender mixing food.
Ƙarfaffun motsin tsokokin ciki suna taimakawa wajen juya abinci ya koma chyme.
Misali: Ciki yana jujjuya abinci k**ar injin mixing.
Case Study A patient with low stomach acid may experience slow digestion and frequent bloating because proteins are not broken down properly.
Example: A person with weak acid feels heavy after eating beans or meat.
Nazarin Lamari Mara lafiya da yake da ƙarancin acid na ciki kan fuskanci jinkirin narkewa da kumburi akai-akai saboda proteins ba sa narkewa yadda ya k**ata.
DIGESTION IN THE SMALL INTESTINE
Most digestion occurs in the small intestine.
Example: The main breakdown of food happens here.
Yawancin narkewa yana faruwa a hanji ƙarami.
Digestive juices from the pancreas liver and small intestine complete the breakdown of carbohydrates proteins and fats.
Example: These juices act like detergents breaking food into tiny pieces.
Ruwayen narkewa daga pancreas da hanta da hanji ƙarami suna kammala narkar da carbohydrates da proteins da fats.
Pancreatic enzymes break down proteins carbohydrates and fats.
Example: They act like chemicals that dissolve food.
Enzymes na pancreas suna karya proteins da carbohydrates da fats.
Bile from the liver breaks large fat droplets into smaller ones to allow easy action of lipase.
Example: Bile acts like soap breaking oil into small parts.
Bile daga hanta yana raba manyan ƙwanƙolin kitse zuwa ƙanana domin lipase ya yi aiki cikin sauƙi.
Small intestinal enzymes complete digestion into simple molecules ready for absorption.
Example: They finish the work so the body can absorb nutrients.
Enzymes na hanji ƙarami suna kammala narkewa zuwa sinadarai masu sauƙi da suke shirye don shanyewa.
DIGESTION IN THE LARGE INTESTINE
The large intestine does not digest food except for limited activity by friendly bacteria.
Example: Only little breakdown happens here.
Hanji babba baya narkar da abinci sai kaɗan daga aikin ƙwayoyin cuta na gari.
Its major role is absorption of water and formation of f***s.
Example: It makes stool hard or soft depending on water.
Babban aikinsa shi ne shanye ruwa da kuma samar da bayan gida.
Example When a person takes enough water stool becomes soft but when water intake is low the stool becomes hard because the large intestine absorbs too much water.
Simple example: Drinking little water causes constipation.
Misali Lokacin da mutum ya sha ruwa sosai bayan gida yana taushi amma idan ruwa bai isa ba bayan gida yana ƙauri saboda hanji babba yana shan ruwa mai yawa.
ABSORPTION OF NUTRIENTS
Absorption happens mainly in the small intestine which is specially designed for this function.
Example: Most nutrients enter the blood here.
Shanyewar gina jiki yawanci yana faruwa a hanji ƙarami wanda aka tsara musamman domin wannan aiki.
It has a large surface area due to villi and microvilli that make absorption faster and more efficient.
Example: Many small folds help collect more nutrients.
Yana da babban fili saboda villi da microvilli waɗanda ke sa shanye gina jiki ya zama cikin sauri da inganci.
ABSORPTION IN THE DUODENUM
The duodenum absorbs minerals such as iron and some vitamins.
Example: Iron from beans is absorbed here.
Duodenum yana shanye ma’adanai irin su iron da wasu vitamins.
It also receives bile and pancreatic juice to complete digestion.
Example: It is the mixing point of bile and enzymes.
Hakanan yana karɓar bile da pancreatic juice domin kammala narkewa.
ABSORPTION IN THE JEJUNUM
The jejunum is the primary site for absorption of most nutrients including carbohydrates proteins vitamins and minerals.
Example: Most food nutrients enter the blood from here.
Jejunum shi ne babban wurin shanye yawancin sinadaran abinci k**ar carbohydrates da proteins da vitamins da minerals.
The numerous villi in this region allow nutrients to enter directly into the bloodstream.
Example: Like many small straws sucking nutrients.
Yawan villi a wannan wuri yana ba sinadaran damar shiga cikin jini kai tsaye.
Example Glucose from bread rice or fruits moves through the villi and enters the blood where it is used for energy.
Simple example: Energy from bread comes from jejunum absorption.
Misali Glucose daga gurasa ko shinkafa ko ’ya’yan itatuwa yana wucewa ta villi ya shiga jini inda ake amfani da shi don ƙarfi.
ABSORPTION IN THE ILEUM
The ileum absorbs fat digestion products and fat soluble vitamins which are vitamins A D E and K.
Example: Oils and fat vitamins enter the body here.
Ileum yana shanye sinadaran kitse da vitamins da suke narkewa a cikin kitse k**ar A D E da K.
It also absorbs vitamin B twelve and bile salts which are recycled back to the liver.
Example: B12 from meat enters the ileum.
Hakanan yana shanye vitamin B twelve da bile salts waɗanda ake mayarwa hanta.
Case Study A patient who has part of the ileum surgically removed may develop vitamin deficiencies especially vitamin B twelve deficiency.
Example: Such a patient may feel weak because B12 is low.
Nazarin Lamari Mara lafiya da aka cire masa wani bangare na ileum…
ABSORPTION INTO BLOOD AND LYMPH
Carbohydrates and proteins are absorbed into the blood vessels of the villi.
Example: Sugar and amino acids move straight into blood.
Carbohydrates da proteins ana shanyewa su shiga cikin jini…
Fats are absorbed into lymphatic vessels called lacteals before entering the bloodstream.
Example: Fatty foods enter lymph first before blood.
Kitse ana shanyewa ya shiga cikin jijiyoyin lymph…
BASIC PRINCIPLES
The gastrointestinal tract uses simple scientific principles to absorb nutrients.
Example: Nutrients move using natural body rules.
These include diffusion active transport and facilitated transport.
Example: Each method helps nutrients enter the body.
Diffusion…
Example: Like perfume spreading in a room.
Active transport…
Example: Like climbing uphill—it needs energy.
This is used for glucose and amino acids.
Example: ORS glucose still enters blood during sickness.
Facilitated transport…
Example: Carrier proteins act like gates.
Example Glucose absorption uses active transport…
Simple example: ORS works even when patient is weak.
IMPORTANCE
Effective digestion and absorption ensure proper nutrition energy and growth.
Example: Children grow well when nutrients are properly absorbed.
Poor digestion leads to malnutrition weakness and digestive disorders.
Example: A person who cannot absorb nutrients may become thin.
For health information management students…
Example: Understanding digestion helps you read hospital files correctly.