Download Chapter 42

BIOLV03 Lecture: Circulation & & Gas Exchange (Campbell 10: Ch 42) ©2014 copyright Marta D.
de Jesus
Problem: how do nutrients, hormones & O2 reach all parts of the body?
I. Transport systems
A. diffusion
B. gastrovascular cavity
C. complex circulatory system
1. open circulatory systems
hemolymph
2. closed circulatory systems
blood
interstitial fluid
II. Vertebrate circulatory systems
A. overall system & heart
1. Evolution
a. single pump
b. double pump
1) amphibians
2) mammals
2. Path of blood flow in the human heart
a. From the body
b. Right atrium
c. Right ventricle
d. From the lungs
e. Left atrium
f. Left ventricle
g. Backflow
3. Contraction cycle/heartbeat control
a. sinoatrial node
b. atrioventricular node
atrioventricular bundle
c. bundle branches
d. the Purkinje fibers
e. ECG/EKG
systole
diastole
B. vessels
1. arteries
2. arterioles
3. capillaries
4. venules
5. veins
C. Regulation of blood flow
1. controlled by
2. blood pressure
a. sensors:
b. cardiovascular center
2. How do we measure BP?
D. Blood
1. Plasma
2. Cell components
a. erythrocytes
erythropoietin
b. leukocytes
c. platelets
clotting factors
prothrombin
thrombin
fibrinogen
fibrin
thrombus
embolus
(won’t be tested on p931-2)
III. Respiratory systems
A. epithelium
B. gills
countercurrent exchange
C. tracheal tubes
D. lungs
respiratory route in us
breathing
(won’t be tested on bird respiratory system details)
E. respiratory pigments
1. hemocyanin
2. hemoglobin
myoglobin
3. partial pressure gradients
4. CO2
5. different forms
(don’t worry about cooperativity, and Bohr shift)
IV. Diving mammals (won’t be tested on this - p943)