MATERIAL WITHIN THE BODY 185 



6. The pumps and the pipe-Hnes of the blood system 



Structure of the heart Vessels 



Chambers Out-carrying (arteries) 



Receiving (auricles) In-carrying (veins) 



Expelling (ventricles) Crossover (capillaries) 



Valves 



Between chambers on same side 

 Between ventricles and outlets 



7. The circulation 



Systemic Pulmonary 



Left ventricle Right ventricle 



Aorta Pulmonary arteries 



Systemic arteries Pulmonary capillaries 



Systemic capillaries Pulmonary vems 



Systemic veins Left auricle 

 Right auricle 



8. Loading and unloading the blood-stream 



At what points the blood takes on what it carries 

 At what points the blood throws off what it carries 

 Nutrients Oxygen Hormones 



Water Carbon dioxid Urea 



Salts 



QUESTIONS 



1. How does the fibrovascular bundle of a plant show division of 

 labor ? 



2. How are the various functions of our blood system carried on by 

 a one-celled plant or animal ? 



3. What is the appearance of a red blood corpuscle under the micro- 

 scope ? of a white corpuscle ? 



4. How does the white corpuscle obtain its food and oxygen ? 



5. In what ways is the blood plasma like serum ? In what ways is 

 it different? 



6. How does serum resemble lymph ? How do the two differ ? 



7. What are the similarities between lymph and plasma ? What are 

 the differences ? 



8. What work is done by the upper chambers of the heart ? by the 

 lower ? 



