le PARCOURS INTERNATIONAL BIOF rôle du sang dans le transport des gaz respiratoires

le  PARCOURS INTERNATIONAL BIOF rôle du sang dans le transport des gaz respiratoires


my dear students subscribers to my channel LABOSVT welcome to this session devoted to the chapter the transport of respiratory gases by the blood and transport of nutrients theme of nutrition functions Third Year International Course Program to download the animations used in this lesson visit the link below the video during the lesson of the blood circulation we discovered the constituents of the blood who are red blood cells or hemeacts white blood cells or leukocytes platelets and blood plasma and the parts of the circulatory system and the role of the heart in the bloodstream in this lesson we will discover the role of blood in the transport of respiratory gases and nutrients in this first activity we will discover how does blood transport respiratory gases which are dioxygen and carbon dioxide by analyzing the following article on sports doping read this article carefully and answer the following questions what is the doppate material used by cyclists quoted in this article what is the action of this hormonne in the body of the athlete what do you conclude you will probably answer the doping material is the OPE hormone this hormone has an action on the formation of red blood cells it increases the number of red blood cells in the blood the increase in the rate of red blood cells i ncreases the amount of dioxygen transported in the blood so the oxygen is carried by the red blood cells so the oxygen is carried by the red blood cells so how do red blood cells carry oxygen? to answer this question we will carry out the following activities in this activity you will discover Statistical data on red blood cells red blood cells or red blood cells are blood cells without a nucleus red blood cells or red blood cells are blood cells without a nucleus as a biconcave disk about 8 μm in diameter about 2μm thick the surface of a red blood cell is about 140 μm² the surface of a red blood cell is about 140 μm² the number of red blood cells per ml of blood is about 5000000 millon the number of red blood cells per ml of blood is about 5000000 millon the number of red blood cells in the 5 l of blood the blood is about 3 * 10power 13 red blood cells the number of red blood cells in the 5 l of blood the blood is about 3 * 10power 13 red blood cells the number of red blood cells in the 5 l of blood the blood is about 3 * 10power 13 red blood cells the number of red blood cells in the 5 l of blood the blood is about 3 * 10power 13 red blood cells 30 trills of red blood cells about 1/4 of our body’s cells the total area of all red blood cells is about 3200 m² the total area of all red blood cells is about 3200 m² the life of a red blood cell is about 120 days red blood cells contain red pigments called hemoglobin red blood cells contain red pigments called hemoglobin each red blood cell contains about 260 millons of hemoglobin molecule each red blood cell contains about 260 millons of hemoglobin molecule these features and properties these features and properties facilitate the transport of respiratory gases and now we’re going to discover how red blood cells carry respiratory gases and now we’re going to discover how red blood cells carry respiratory gases by performing the following experiment analyze this experience and answer the following questions describe this experience what is his result how to interpret this result chemically what do you conclude you will probably answer we barbote dioxygen in fresh blood we see that the blood goes from a sombe red color to a light red color we see that the blood goes from a sombe red color to a light red color as a chemical interpretation you know well that blood red blood cell color is determined by hemoglobin and donating blood is determined by hemoglobin which is a dark red pigment in red blood cells which is a dark red pigment in red blood cells which is a dark red pigment in red blood cells hemoglobin reacts chemically with dioxygen hemoglobin reacts chemically with dioxygen indeed in the lungs medium rich in oxygen molecules of dioxygenes associate with molecules of hemoglobin molecules of dioxygenes associate with molecules of hemoglobin to form a complex called oxy-hemoglobin light red when the red blood cells reach the organs who are poor in oxygen and rich in carbon dioxide the molecules of the tenagen dissociate from the hemoglobin the molecules of the tenagen dissociate from the hemoglobin to restore hemoglobin always in the organs some of the carbon dioxide which is reject by the cells combines with hemoglobin to form carbohemoglobin to form carbohemoglobin which will be transported to the lungs where carbon dioxide dissociates from carbohemoglobin as shown by this chemical reaction which is reversible as conclusion a grade part of the respiratory gases is transported in the blood by hemoglobin as this scheme shows some of the respiratory gases are transported dissolved in the blood plasma some of the respiratory gases are transported dissolved in the blood plasma the danger must be pointed out of carbon monoxide poisoning which is cleared by the heating gas appliance following an incomplete combustion in closed spaces like bath rooms and bedrooms the toxycite of this gas resides in the fact that this gas is definitely associated with hemoglobin in the fact that this gas is definitely associated with hemoglobin irreversibly and occupies the site of transport of oxygen which hinders the transport of dioxygens to the cells in such poisoning situation in such poisoning situation the victim falls into a coma then dies asphyxiated if he is not evaded if it is not mentioned and emergency help as prevention it is necessary to install gas heaters in open spaces as prevention it is necessary to install gas heaters in open spaces regarding the transport of nutrients blood plasma is a solution that contains the molecules of nutrients blood plasma is a solution that contains the molecules of nutrients dissolved like glucose amino acids mineral salts, vitamins ….. dissolved like glucose amino acids mineral salts, vitamins ….. so the nutrients are transported in the plasma My dear students, we have arrived at the end of this lesson I invite you to subscribe to my channel LABOS VT as I await your observations to improve these educational productions thank you and goodbye

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