Unit 11 Gas Exchange & Excretion

Unit 11-- Gas Exchange & Excretion Ch. 22: Gas Exchange & Excretion

Essential Questions:  How and why is gas exchange important in maintaining homeostasis?  How and why is excretion of metabolic waste important in maintaining homeostasis?  What are the structures of the human gas exchange system and their functions?  What are the structures of the human excretory system and their functions?

You should be able to:  Discuss the role of gas exchange in plants and its necessity in maintaining homeostasis.  Discuss the role of the respiratory system in animals and its necessity in maintaining homeostasis.  Explore the necessity for having adaptations for maintaining osmotic balance in organisms.  Describe the process of maintaining osmotic balance and excretion in simple freshwater organisms.  Describe the function of excretion and the maintenance of osmotic equilibrium in those animals possessing a circulatory system.  Understand the function of the human excretory system and its necessity for maintaining homeostasis.  Compare the functioning of the respiratory systems of the animal kingdom including annelids, bony fish, mammals and humans.

VOCABULARY air (atmospheric) pressure nephron alveolus (alveoli = plural) nitrogenous waste ammonia operculum Bowman’s capsule (glomerular capsule) osmotic balance bronchiole oxygen bronchus (bronchi = plural) pharynx carbon dioxide reabsorption contractile vacuole renal artery diaphragm renal vein diffusion respiration excretion root hairs filtration secretion flame cells spiracles hemoglobin stomata gill trachea glomerulus tracheole kidney urea larynx ureter lenticle urethra lung uric acid Malpighian tubules urinary bladder nephridia urine

Book Work

Ch 22: Gas Exchange & Excretion  Section 22.1 o Read pgs 610-622 o answer # 1, 2, 3, 4, 5 (pg 622)  Section 22.2 o Read pgs 623-632 o answer # 2 & 4 (pg 632)  Read B, T, & S section (pg 633-635)  Chapter review questions Unit 11-- Gas Exchange & Excretion o answer # 1, 2, 3, 5, 12, 13, 14, 15 (pgs 636-637)