1. This week in 206
I. Physiology of the Crayfish
II. Human cardiovascular physiology
III. Circulation in the gold fish

2. Animal respiration and circulation.
What is respiration?

3. Animal respiration and circulation.
What is respiration?
Glucose + O2
CO2 + H2O + E
Breathing.

4. Circulatory
system
Gills or
lungs
Tissues
Organs O2
O2 + Glucose
Outside O2
CO2
Air or
water O2
CO2 O2
CO2 O2
CO2
CO2 + H2O + E
CO2
Membrane(s)
Membrane(s)
O2 21%
CO2 <1%

5. Circulatory systems
vs.
Open
Closed
Arthropods/crustacea
Vertebrates human
Crayfish
Blood pumped in pipes and
Never touches tissues-arteries/veins
Blood pumped out to
tissues, dumped in sinuses
Trend is to separate oxygenated
From non-oxygenated blood
Tissues ~bathed
Comes back to heart
Through sinuses and
Reenters through ostia
Low pressure-low resistance
High volume
High pressure-high resistance
Low volume

6. Respiratory systems

7. Open circulatory system
Heart Sinuses Heart
arteries
ostia
Ophthalmic- eyes
Antennal- antennae, antennules,
green glands
Hepatic- digestive gland
Arteries
Ostia

8. Vertebrate circulatory systems
Closed
Vertebrate circulatory systems

9. Human heart
2 systems- pulmonary and systemic.

10. Structure of blood vessels

11. Human respiratory system

12. Angioplasty

13. Coronary bypass

14. Measuring Blood Pressure
Sphygmomanometer
Stethoscope
High pressure = systolic, blood flow stopped above this
Low pressure = diastolic, flow unrestricted below this
120 mm Hg
80 mm Hg

15. Crayfish respiration

16. Dr. James L. Larimer
UT-Austin professor
Zoology / Neurobiology

17. Set O2 level and
monitor
Bubble O2 or N2
Measure ventilation rate