unit 3 systems of nutrition the relation between the systems involved in nutrition biology and...
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UNIT
3Systems of nutrition
THE RELATION BETWEEN THE SYSTEMS INVOLVED IN NUTRITION
Biology and Geology 3. Secondary Education
UNIDAD
3Relation between the systems involved in nutrition
UNIT
3
Biology and Geology 3. Secondary Education
SYSTEMS INVOLVED IN NUTRITION
HOW THE EXCHANGE OF SUBSTANCES TAKES PLACE
UNIDAD
3Relation between the systems involved in nutrition
UNIT
3
Biology and Geology 3. Secondary Education
• Imagine that this drawing represents a human.
How do they manage it?
• As with all multicellular organisms, most of the cells in our body are not in contact with the external environment.
Cells of our body
External environment
Inside our body
• However, they need to exchange substances with the outside.
UNIDAD
3Relation between the systems involved in nutrition
UNIT
3
Biology and Geology 3. Secondary Education
• To “help” the cells, our body has various specialised systems for the exchange of substances with the exterior.
These are:
• We will represent them in the drawing like this…
UNIDAD
3Relation between the systems involved in nutrition
UNIT
3
Biology and Geology 3. Secondary Education
The digestive system…
UNIDAD
3Relation between the systems involved in nutrition
UNIT
3
Biology and Geology 3. Secondary Education
…the respiratory system…
UNIDAD
3Relation between the systems involved in nutrition
UNIT
3
Biology and Geology 3. Secondary Education
…and the excretory system
UNIDAD
3Relation between the systems involved in nutrition
UNIT
3
Biology and Geology 3. Secondary Education
• In addition, our organism has two systems which transport substances all around the body:
the circulatory system (with blood)…
UNIDAD
3Relation between the systems involved in nutrition
UNIT
3
Biology and Geology 3. Secondary Education
…and the lymphatic system(with lymph)
UNIDAD
3Relation between the systems involved in nutrition
UNIT
3
Biology and Geology 3. Secondary Education
SYSTEMS INVOLVED IN NUTRITION
HOW THE EXCHANGE OF SUBSTANCES TAKES PLACE
UNIDAD
3Relation between the systems involved in nutrition
UNIT
3
Biology and Geology 3. Secondary Education
These systems permit the exchange of substances between the cells and the exterior. To find out how the exchange of substances takes place in each one of these systems, CLICK on the buttons.
• Exchange of substances in the digestive system
• Exchange of substances in the respiratory system
• Exchange of substances in the circulatory system and in the lymphatic system
• Exchange of substances in the excretory system and in other organs
UNIDAD
3Relation between the systems involved in nutrition
UNIT
3
Biology and Geology 3. Secondary Education
We ingest food
• The digestive system obtains the nutrients contained in food…
Nutrients
• …and passes them into the transportation systems.
Exchange of substances in the digestive system
UNIDAD
3Relation between the systems involved in nutrition
UNIT
3
Biology and Geology 3. Secondary Education
These systems permits the exchange of substances between the cells and the exterior. To find out how the exchange of substances takes place in each one of these systems, CLICK on the buttons.
• Exchange of substances in the digestive system
• Exchange of substances in the respiratory system
• Exchange of substances in the circulatory system and in the lymphatic system
• Exchange of substances in the excretory system and in other organs
UNIDAD
3Relation between the systems involved in nutrition
UNIT
3
Biology and Geology 3. Secondary Education
We take in air
• The respiratory system enables us to take in air from the exterior…
Oxygen
• … and so the oxygen from the air passes into the blood.
Exchange of substances in the respiratory system
UNIDAD
3Relation between the systems involved in nutrition
UNIT
3
Biology and Geology 3. Secondary Education
These systems, the exchange of substances between the cells and the exterior. To find out how the exchange of substances takes place in each one of these systems, CLICK on the buttons.
• Exchange of substances in the digestive system
• Exchange of substances in the respiratory system
• Exchange of substances in the circulatory system and in the lymphatic system
• Exchange of substances in the excretory system and in other organs
UNIDAD
3Relation between the systems involved in nutrition
UNIT
3
Biology and Geology 3. Secondary Education
• The blood and lymph carry the nutrients and oxygen to the cells throughout the body.
Nutrients
Oxygen
Exchange of substances in the circulatory system and in the lymphatic system
UNIDAD
3Relation between the systems involved in nutrition
UNIT
3
Biology and Geology 3. Secondary Education
• The cells use the nutrients and oxygen to obtain energy and perform their functions.
• They produce CO2 and other waste substances, which they expel. These are collected by the transport systems and carried to the systems that expel them from the body.
Waste
CO2
Exchange of substances in the circulatory system and in the lymphatic system
UNIDAD
3Relation between the systems involved in nutrition
UNIT
3
Biology and Geology 3. Secondary Education
These systems permits the exchange of substances between the cells and the exterior. To find out how the exchange of substances takes place in each one of these systems, CLICK on the buttons.
• Exchange of substances in the digestive system
• Exchange of substances in the respiratory system
• Exchange of substances in the circulatory system and in the lymphatic system
• Exchange of substances in the excretory system and in other organs
UNIDAD
3Relation between the systems involved in nutrition
UNIT
3
Biology and Geology 3. Secondary Education
• The respiratory system takes the CO2 from the blood and expels it in exhalation
CO2
• Many of the other waste products are collected by the blood and the excretory system and are expelled in the form of urine.
Waste
• The same is true of the sweat glands, which expel waste in the form of sweat.
Exchange of substances in the excretory system and in other organs
UNIDAD
3Relation between the systems involved in nutrition
UNIT
3
Biology and Geology 3. Secondary Education
All these processes take place at the same time
Go to the activities, CLICK
Go to the main menu,
CLICK
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3Relation between the systems involved in nutrition
UNIT
3
Biology and Geology 3. Secondary Education
1. Explain what each one of the arrows represents.
Activities
To start again, CLICK