Post on 28-Dec-2015
REVIEW: RECALL THE REACTANTS FOR CELLULAR RESPIRATION…
•What three major organ systems are directly involved in providing the reactants for
cellular respiration to the body cells?
DIGESTIVE SYSTEM – BREAKS DOWN FOOD CONTAINING CARBOHYDRATES, LIPIDS, AND PROTEINS INTO SMALLER UNITS
• Mouth – teeth, enzymes in saliva
• Pharynx –throat; common passage for food and air
• Esophagus – tube to stomach
• Stomach- acid, enzymes • Small intestine – major site
of digestion; macromolecules absorbed into bloodstream
DIGESTIVE SYSTEM – BREAKS DOWN FOOD CONTAINING CARBOHYDRATES, LIPIDS, AND PROTEINS INTO SMALLER UNITS
• Large intestine – excess water absorbed
• Rectum/anus – solid waste excreted Liver – produces bile which digests fats
• Liver – produces bile which digests fats
• Gall bladder – releases bile into SI• Pancreas – excretes enzymes to
SI and produces hormones to regulate glucose levels in blood
RESPIRATORY SYSTEM – TAKES IN OXYGEN GAS AND GETS RID OF CARBON DIOXIDE GAS
• Mouth/nose - air entry
• Pharynx – passage behind nasal and oral cavity
• Larynx – voice box; vocal cords• Trachea – wind pipe • Bronchi – branch to lungs
RESPIRATORY SYSTEM – TAKES IN OXYGEN GAS AND GETS RID OF CARBON DIOXIDE GAS
• Lungs – contains bronchioles and alveoli
• Alveoli – grape-like clusters/sacs surrounded by capillaries; site of gas exchange
CIRCULATORY SYSTEM – CARRIES OXYGEN FROM LUNGS TO BODY CELLS AND CARBON DIOXIDE FROM CELLS TO LUNGS
• Heart – pumps blood • Arteries–carry blood
away from heart • Veins-return blood to
heart; have valves• Capillaries–tiny blood
vessels where gas exchange occurs with body cells • Hemoglobin–proteinin
blood that carries oxygen
EXCRETORY SYSTEM – REMOVES WASTE FROM THE BODY
• Kidneys – filter nitrogen waste (urea) from blood; control water balance
• Ureters – carries urea to bladder • Urinary Bladder – holds urine • Urethra- external opening
EXCRETORY SYSTEM – REMOVES WASTE FROM THE BODY
• Skin – waste removed through sweat glands
• Lungs – CO2 waste and H20 exhaled
SUMMARY
The reactants for cellular respiration, O2 and glucose, are brought into the body by the _________________ and _________________ systems. The ____________________ transports the reactants to all of the cells of the body, where ATP is made in the ________________ of the cells. Waste products, CO2 and H2O are transported away from cells by the _________________ system. The nitrogen waste and CO2 is filtered and removed from the blood by the _________________ system, which includes the urinary, respiratory, and integumentary systems.