UNIT 3 Systems of nutrition THE RELATION BETWEEN

UNIT 3 Systems of nutrition THE RELATION BETWEEN THE SYSTEMS INVOLVED IN NUTRITION Biology and Geology 3. Secondary Education

UNIT UNIDAD 3 Relation between the systems involved in nutrition SYSTEMS INVOLVED IN NUTRITION HOW THE EXCHANGE OF SUBSTANCES TAKES PLACE Biology and Geology 3. Secondary Education

UNIT UNIDAD 3 Relation between the systems involved in nutrition • Imagine that this drawing represents a human. Inside our body • As with all multicellular organisms, most of the cells in our body are not in contact with the external environment. • However, they need to exchange substances with the outside. Cells of our body How do they manage it? Biology and Geology 3. Secondary Education External environment

UNIT UNIDAD 3 Relation between the systems involved in nutrition • To “help” the cells, our body has various specialised systems for the exchange of substances with the exterior. • We will represent them in the drawing like this… These are: Biology and Geology 3. Secondary Education

UNIT UNIDAD 3 Relation between the systems involved in nutrition The digestive system… Biology and Geology 3. Secondary Education

UNIT UNIDAD 3 Relation between the systems involved in nutrition …the respiratory system… Biology and Geology 3. Secondary Education

UNIT UNIDAD 3 Relation between the systems involved in nutrition …and the excretory system Biology and Geology 3. Secondary Education

UNIT UNIDAD 3 Relation between the systems involved in nutrition • In addition, our organism has two systems which transport substances all around the body: the circulatory system (with blood)… Biology and Geology 3. Secondary Education

UNIT UNIDAD 3 Relation between the systems involved in nutrition …and the lymphatic system (with lymph) Biology and Geology 3. Secondary Education

UNIT UNIDAD 3 Relation between the systems involved in nutrition SYSTEMS INVOLVED IN NUTRITION HOW THE EXCHANGE OF SUBSTANCES TAKES PLACE Biology and Geology 3. Secondary Education

UNIT UNIDAD 3 Relation between the systems involved in nutrition 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 Biology and Geology 3. Secondary Education

UNIT UNIDAD 3 Relation between the systems involved in nutrition Exchange of substances in the digestive system We ingest food Nutrients • The digestive system obtains the nutrients contained in food… • …and passes them into the transportation systems. Biology and Geology 3. Secondary Education

UNIT UNIDAD 3 Relation between the systems involved in nutrition 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 Biology and Geology 3. Secondary Education

UNIT UNIDAD 3 Relation between the systems involved in nutrition Exchange of substances in the respiratory system We take in air • The respiratory system enables us to take in air from the exterior… • … and so the oxygen from the air passes into the blood. Biology and Geology 3. Secondary Education Oxygen

UNIT UNIDAD 3 Relation between the systems involved in nutrition 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 Biology and Geology 3. Secondary Education

UNIT UNIDAD 3 Relation between the systems involved in nutrition Exchange of substances in the circulatory system and in the lymphatic system • The blood and lymph carry the nutrients and oxygen to the cells throughout the body. Nutrients Oxygen Biology and Geology 3. Secondary Education

UNIT UNIDAD 3 Relation between the systems involved in nutrition Exchange of substances in the circulatory system and in the lymphatic system • The cells use the nutrients and oxygen to obtain energy and perform their functions. • They produce CO 2 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. Biology and Geology 3. Secondary Education Waste CO 2

UNIT UNIDAD 3 Relation between the systems involved in nutrition 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 Biology and Geology 3. Secondary Education

UNIT UNIDAD 3 Relation between the systems involved in nutrition Exchange of substances in the excretory system and in other organs • The respiratory system takes the CO 2 from the blood and expels it in exhalation • Many of the other waste products are collected by the blood and the excretory system and are expelled in the form of urine. • The same is true of the sweat glands, which expel waste in the form of sweat. Biology and Geology 3. Secondary Education Waste CO 2

UNIT UNIDAD 3 Relation between the systems involved in nutrition All these processes take place at the same time Go to the activities, CLICK Go to the main menu, CLICK Biology and Geology 3. Secondary Education

UNIT UNIDAD Relation between the systems involved in nutrition 3 Activities 1. Explain what each one of the arrows represents. To start again, CLICK Biology and Geology 3. Secondary Education