1. 1 12.16.15 Catalyst »Give advice on how to tell the independent and dependent variables in an experiment apart. »I will investigate the respiratory and circulatory systems.

2. 2 The week… »Today Circ/Resp intro & partner processing »Thursday - Circ/Resp Image Expertise (Begin Mozart Analysis) »Friday - Wrap Mozart/ Project Planning

3. Fig. 42-21a Parapodium (functions as gill) (a) Marine worm

4. Fig. 42-21b Gills (b) Crayfish

5. Fig. 42-21c (c) Sea star Tube foot Coelom Gills

6. Fig. 42-22 Anatomy of gills Gill arch Water flow Operculum Gill arch Gill filament organization Blood vessels Oxygen-poor blood Oxygen-rich blood Fluid flow through gill filament Lamella Blood flow through capillaries in lamella Water flow between lamellae Countercurrent exchange P O 2 (mm Hg) in water P O 2 (mm Hg) in blood Net diffu- sion of O 2 from water to blood 150120906030 1108020 Gill filaments 50 140

7. Fig. 42-23 Air sacs Tracheae External opening Body cell Air sac Tracheole TracheolesMitochondriaMuscle fiber 2.5 µm Body wall Trachea Air

8. Fig. 42-24 Pharynx Larynx (Esophagus) Trachea Right lung Bronchus Bronchiole Diaphragm Heart SEM Left lung Nasal cavity Terminal bronchiole Branch of pulmonary vein (oxygen-rich blood) Branch of pulmonary artery (oxygen-poor blood) Alveoli Colorized SEM 50 µm

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12. 12 Artery v. Vein