3.2.1.3. Swallowing

Swallowing food

The swallowing is the passage of the bolus from the mouth to the pharynx and then the esophagus. It is started by pushing the food bolus into the pharynx with the tongue.

The pharynx is a common passageway in the respiratory and digestive tracts, through which both air and the food bolus pass. To prevent the food bolus from going through the airways, we have a cartilage called the epiglottis that blocks the passage of the bolus towards the larynx, preventing us from choking.

After the pharynx, the digestive tube continues with the esophagus, a tube about 25 cm in length that is connected to the stomach through the cardia, a sphincter that controls the entry of the food bolus into the stomach and prevents its backward movement.

The food bolus travels through the esophagus through peristaltic movements, contractions and dilations of the muscles in the wall of the esophagus that knead, mix and advance the food bolus into the stomach.

Movimientos peristálticos en el esófago

Activity: Digestion

Answer in your notebook

3.3.- What is the function of the epiglottis?

Answer in your notebook

3.4.- What does it mean that "the food has gone the other way"?

Answer in your notebook

3.5.- What are peristaltic movements? Draw a sequence showing the progress of the peristaltic movement in the esophagus. How can the bolus move when astronauts eat without being subjected to the action of gravity?

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Skip navigation Biology and Geology 3rd compulsory secondary education Biology and Geology 3rd ESO 01. General organization of the human body 1.1. Levels of organization of the human body 1.2. The cell 1.2.1. The prokaryotic cell 1.2.2. The eukaryotic cell 1.2.2.1. The eukaryotic animal cell 1.2.2.2. The eukaryotic plant cell 1.3. Tissues 1.4. Organs, systems and apparatus 1.5. Bibliography and student work 02. Food and health 2.1. Feeding and nutrition 2.2. Nutrients 2.2.1. Types of nutrients 2.2.2. The energy of nutrients 2.3. The food 2.4. Diets 2.5. Food consumption 2.5.1. Labelled 2.5.2. How to shop and cook 2.6. Food preservation and hygiene 2.7. Food production 2.7.1. Intensive agriculture 2.7.2. Intensive livestock 2.7.3. Aquaculture 2.7.4. Transgenic foods 2.7.5. Organic food 2.8. Eating-related illnesses 2.9. Bibliography and student work 03. The digestive system and digestion 3.1. Nutrition function 3.2. Digestive system 3.2.1. Ingestion 3.2.1.1. Chewing 3.2.1.2. Insalivation 3.2.1.3. Swallowing 3.2.2. Digestion 3.2.3. Absorption 3.2.4. Expulsion or egestion 3.3. Diseases of the digestive system 3.3.1. Diseases in the mouth 3.3.2. Diseases in the stomach 3.3.3. Diseases in the intestine 3.3.4. Liver disease 3.4. Healthy habits related to the digestive system 3.5. Bibliography and student work 04. The respiratory system and respiration 4.1. Respiratory tract and lungs 4.1.1. Airways 4.1.2. Lungs 4.1.3. The gaseous exchange 4.2. Respiratory activity 4.3. Diseases of the respiratory system 4.4. Healthy habits related to the respiratory system 4.5. Bibliography and student work 05. The circulatory system and circulation 5.1. General organization of the circulatory system 5.2. The blood 5.3. The heart 5.4. Heart movements 5.5. Blood vesels 5.6. Blood pressure 5.7. The blood circulation 5.8. Lymph and lymphatic system 5.9. Diseases of the circulatory system 5.9.1. Diseases of the blood vessels 5.9.2. Heart disease 5.9.3. Blood diseases 5.10. 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The menstrual cycle 11.1.6. Fertilization, pregnancy and childbirth 11.1.6.1. Fertilization 11.1.6.2. Pregnancy 11.1.6.3. Birth 11.2. Natality control 11.2.1. Contraceptive methods 11.2.2. Reproduction techniques 11.2.2.1. Exploratory techniques 11.2.2.2. Assistance techniques in childbirth 11.2.2.3. Assisted reproductive techniques 11.3. Adolescence and sexuality 11.4. Main sexually transmitted diseases and prevention 11.5. Prevention and sexual hygiene 11.6. Bibliography and student work 12. Health and disease 12.1. What is health? 12.1.1. Health indicators 12.1.2. Health determinants 12.2. The disease and types of diseases 12.3. Infectious diseases 12.3.1. Types of infectious diseases 12.3.2. Immunity and immune system 12.3.3. Prevention and cure of infectious diseases 12.4. Non-infectious diseases 12.5. First aid 12.6. Transplants and donation of cells, blood and organs 12.7. Bibliography and student work 13. Ecosystems 13.1. Ecosystem components 13.2. Types of ecosystems 13.3. Factors influencing the ecosystem 13.4. Balance in ecosystems 13.5. The soil as an ecosystem 13.6. Bibliography and student work 14. The external geological activity of the Earth 14.1. Solar energy on Earth 14.2. External geological processes 14.2.1. Weathering 14.2.2. Erosion, transport and sedimentation 14.3. Factors that condition the modeling of the relief 14.4. Forms of relief modeling 14.4.1. Wild or stream waters 14.4.2. Torrential modeling 14.4.3. River modeling 14.4.4. Karst modeling. Groundwater 14.4.5. Littoral modeling 14.4.6. Glacier modeling 14.4.7. Wind or desert modeling 14.5. Geological action of living beings 14.6. Geological action of the human being 14.7. Bibliography and student work 15. The internal geological activity of the Earth 15.1. The internal energy of the Earth 15.2. Volcanoes 15.2.1. Types of volcanoes 15.2.2. Volcanic risk 15.3. Earthquakes 15.3.1. Seismic risk 15.4. Bibliography and student work « Previous \| Next » 3.2.1.3. Swallowing Swallowing food The swallowing is the passage of the bolus from the mouth to the pharynx and then the esophagus. It is started by pushing the food bolus into the pharynx with the tongue. The pharynx is a common passageway in the respiratory and digestive tracts, through which both air and the food bolus pass. To prevent the food bolus from going through the airways, we have a cartilage called the epiglottis that blocks the passage of the bolus towards the larynx, preventing us from choking. After the pharynx, the digestive tube continues with the esophagus, a tube about 25 cm in length that is connected to the stomach through the cardia, a sphincter that controls the entry of the food bolus into the stomach and prevents its backward movement. The food bolus travels through the esophagus through peristaltic movements, contractions and dilations of the muscles in the wall of the esophagus that knead, mix and advance the food bolus into the stomach. Activity: Digestion Answer in your notebook 3.3.- What is the function of the epiglottis? Answer in your notebook 3.4.- What does it mean that "the food has gone the other way"? Answer in your notebook 3.5.- What are peristaltic movements? Draw a sequence showing the progress of the peristaltic movement in the esophagus. How can the bolus move when astronauts eat without being subjected to the action of gravity? Licensed under the Creative Commons Attribution Share Alike License 4.0 « Previous \| Next » You can ask, comment, contribute, get in touch with other users in the forum of this course. This course is translated from https://biologia-geologia.com/BG3/
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Swallowing food