Podcast
Questions and Answers
What is a system in the context of the human body?
What is a system in the context of the human body?
A grouping of organs performing a function.
Which of the following are main systems of the human body?
Which of the following are main systems of the human body?
- Circulatory
- Respiratory
- Digestive
- Musculoskeletal
- Excretory
- Nervous
- Reproductive
- All of the above (correct)
What is the function of the digestive system?
What is the function of the digestive system?
The digestive system breaks down food into dissolved nutrients for absorption into the bloodstream; extracts and absorbs nutrients; removes wastes; maintains water and chemical balances.
List the structures of the digestive system.
List the structures of the digestive system.
Name the main processes of the digestive system.
Name the main processes of the digestive system.
What is ingestion?
What is ingestion?
What is absorption in the digestive system?
What is absorption in the digestive system?
What mechanical digestion occurs in the mouth?
What mechanical digestion occurs in the mouth?
What process carries the bolus toward the stomach once it enters the oesophagus?
What process carries the bolus toward the stomach once it enters the oesophagus?
What two types of digestion occur in the stomach?
What two types of digestion occur in the stomach?
What does the Bile emulsify lipids (fats) into?
What does the Bile emulsify lipids (fats) into?
What covers the walls of the small intestine?
What covers the walls of the small intestine?
What happens in parts of the large intestine (colon)?
What happens in parts of the large intestine (colon)?
Flashcards
What is a system in the body?
What is a system in the body?
A grouping of organs performing a specific function within the body.
Digestive System Function
Digestive System Function
Breaks down food into nutrients the body can absorb; removes waste.
Digestive System Organs
Digestive System Organs
Mouth, oesophagus, stomach, intestines (small & large), liver, rectum and anus.
Ingestion
Ingestion
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Digestion (process)
Digestion (process)
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Absorption (digestion)
Absorption (digestion)
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Egestion
Egestion
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Ingestion location
Ingestion location
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What is Peristalsis?
What is Peristalsis?
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Stomach's Role
Stomach's Role
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Gallbladder Function
Gallbladder Function
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What are Villi?
What are Villi?
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Large Intestine's job
Large Intestine's job
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Study Notes
- Natural Science for Grade 9
Systems in the Human Body
- A system is a grouping of organs performing a function
- There are 7 main systems: Circulatory, respiratory, digestive, musculoskeletal, excretory, nervous, and reproductive
- 5 systems will be discussed
Digestive System
- Breaks down food into dissolved nutrients that are absorbed into the bloodstream
- Extracts and absorbs nutrients from food
- Removes wastes
- Maintains water and chemical balances
- Structures includes: Mouth, oesophagus, stomach, intestines (small & large), liver, rectum, and anus
Main Processes in the Digestive System
- Ingestion occurs when eating or drinking through the mouth
- Digestion involves mechanical and chemical processes to convert food
- Nutrients are taken up by the blood system during absorption
- Egestion involves undigested food and materials passing through the anus in the form of feces
Process of Digestion
- Food processing starts with ingestion, which is eating
- Teeth perform mechanical digestion of food by masticating (chewing)
- Peristalsis (wave-like contractions) of smooth muscle carries the bolus (food ball) toward the stomach once entering the oesophagus
- The bolus passes through a sphincter (muscular ring) from the oesophagus into the stomach
- The stomach performs chemical (hydrochloric acid) and mechanical digestion
- Bile from the liver is contained in the gallbladder and emulsifies (breaks into small particles) lipids (fats), which aids in mechanical digestion of fats
- Tiny villi (finger-like projections) cover the walls of the small intestine, increasing the surface area for more efficient food absorption
- Water and minerals are absorbed from undigested food by parts of the large intestine (colon)
- Remaining material is compacted into feces
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