Presentation on theme: "Digestive and Circulatory Systems"— Presentation transcript:
1Digestive and Circulatory Systems 9. a. Students know how the complementary activity of major body systems provides cells with oxygen and nutrients and removes toxic waste products such as carbon dioxide.&9. f.* Students know the individual functions and sites of secretion of digestive enzymes (amylases, proteases, nucleases, lipases), stomach acid, and bile salts.
2Oxygen molecules move from the air to the alveoli of the lungs and then to the circulatory system
3Circulatory SystemFrom the circulatory system glucose and oxygen molecules move from the capillaries into the cells of the body where cellular respiration occurs.
4The HeartThe heart is made up mostly of cardiac muscle tissue, which contracts to pump blood.
5O2 and CO2 in the BloodThe gas exchange process is reversed for the removal of carbon dioxide from its higher concentration in the cells to the circulatory system and, finally, to its elimination by exhalation from the lungs.
6The Digestive SystemThe digestive system delivers nutrients (e.g., glucose) to the circulatory system.
7Source of EnergyAll of our energy comes from the macromolecules in the food we eat.CarbohydratesLipidsProteinsNucleic Acids
8Digestive EnzymesFood proceeds from the mouth through the stomach and through the small intestines).Salivary glands secrete amylase enzymes that change starch into sugar.
9Digestive System in the Human Body Stomach acid and gastric enzymes begin the breakdown of protein
10Pancreas Secretes amylase enzymes that change starch into sugar. Secretes lipase enzymes to break down fat molecules (which contain 3 fatty acids) to free fatty acids plus diglycerides (which contain 2 fatty acids) and monoglycerides (which contain 1 fatty acid).
11LiverBile secreted by the liver furthers the process of digestion, emulsifying fats and facilitating digestion of lipids.The liver removes toxic materials from the blood, stores them, and excretes them into the bile. The liver also regulates blood glucose.The concentration of sugar in the blood is monitored, and sugar can be stored or pulled from reserves (glycogen) in the liver and muscles
15Nucleic Acid Digestion Fat Digestion CarbohydrateDigestionProtein DigestionNucleic Acid DigestionFat DigestionMouthSalivary Amylase(starches into sugars)StomachPepsin(proteins into small polypeptides)Small IntestinePancreatic AmylasePancreaticPancreatic nucleasesBile SaltsPancreatic LipaseLarge Intestine
16Draw a concept map of the enzymes involved in digestion
17In case………Amino acids contained in proteins can also serve as an energy source, but first the amino acids must be deaminated, or chemically converted, in the liver, producing ammonia (a toxic product), which is converted to water-soluble urea and excreted by the kidneys.
18KidneysThe water, urea, and salts that remain in the nephron are eliminated as urine.
19KidneysMicroscopic nephrons within the kidney filter out body wastes, regulate water, and stabilize electrolyte levels in blood.