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StudyStack Set 2

Weeks 7-13

QuestionAnswer
Primary function of the digestive system To bring essential nutrients into the internal environment so each cell has access for energy and maintenance.
Mechanical digestion Physical breakdown: chewing (mouth), churning (stomach), segmentation (small intestine).
Chemical digestion Enzymes break complex food molecules into smaller absorbable molecules.
Propulsion in the digestive tract Swallowing and peristalsis move food through the GI tract.
Main site of nutrient absorption Small intestine absorbs nutrients and water into blood and lymph.
Large intestine function Absorbs remaining water and forms feces for elimination.
Primary function of the respiratory system Provide oxygen to tissues and remove carbon dioxide from the body.
Why gas exchange must be regulated Body demands change; homeostasis must be maintained.
Systems interacting with respiratory physiology Acid-base balance, circulation, metabolism, water and electrolyte balance.
Lymphatic system main function Drains excess tissue fluid and returns it to bloodstream; supports immune defense.
What is lymph? Interstitial fluid that enters lymphatic vessels.
How many liters of plasma leave capillaries per day? 20 liters; 17 reabsorbed; 3 liters become lymph.
What is lymphedema? Swelling caused by blocked or damaged lymphatic vessels preventing fluid return.
How does lymph prevent backflow? One-way valves keep lymph moving toward the heart.
Why lymphatic & respiratory systems are vital to homeostasis Respiration maintains oxygen/CO₂ balance; lymphatic maintains fluid and immune balance.
Created by: Caihong Su
 

 



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