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Transcript of Today: Circulation and Respiration Exam 2 T 4/5 in class (bring cheat sheet) Take-home 2 due 4/5 in...
![Page 1: Today: Circulation and Respiration Exam 2 T 4/5 in class (bring cheat sheet) Take-home 2 due 4/5 in class.](https://reader031.fdocuments.in/reader031/viewer/2022032805/56649eeb5503460f94bfc219/html5/thumbnails/1.jpg)
Today:Circulation and Respiration
Exam 2 T 4/5 in class (bring cheat sheet)Take-home 2 due 4/5 in class
![Page 2: Today: Circulation and Respiration Exam 2 T 4/5 in class (bring cheat sheet) Take-home 2 due 4/5 in class.](https://reader031.fdocuments.in/reader031/viewer/2022032805/56649eeb5503460f94bfc219/html5/thumbnails/2.jpg)
Sources of transported material
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B-cells, T-cells, antibodies, nutrients, waste, O2, CO
2, water,
minerals, etc must be transported throughout the body
Fig42.17
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Fig 42.6
B-cells, T-cells, antibodies, nutrients, waste, O
2,
CO2, water,
minerals, etc must be transported throughout the body
![Page 5: Today: Circulation and Respiration Exam 2 T 4/5 in class (bring cheat sheet) Take-home 2 due 4/5 in class.](https://reader031.fdocuments.in/reader031/viewer/2022032805/56649eeb5503460f94bfc219/html5/thumbnails/5.jpg)
Fig 42.6
Humans have two ciculatory circuits: pulmonary and systemic
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Fig42.10
Blood flows from arteries to capillaries to veins
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Capillaries provide the large surface area required for these exchanges to take place.
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Fig 42.11
Blood pressure changes as the blood moves from arteries to capillaries
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Fig 42.16
This change in pressure causes fluid to leak out of the capillaries
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Highpressure,Fluid forced out
Blood in vein,More viscous
Interstitial fluid,Recovered by…
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Fig 42.16
Not all of the fluid (~15%) is reabsorbed on the venous side. This interstitial fluid is collected by the lymphatic system.
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Lymphatic system
Fig 43.7
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The lymphatic system collects interstitial fluid from the body and returns the fluid to the blood as the blood is reentering the heart
Lymphvessel
Fig 41.16
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Fats and lipids move through the lymphatic system, whichreturns fluid to blooddirectly beforeheart
Lymphvessel
smallintestine
Fig 41.16
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Fig 42.14
Because of the low pressure in veins and lymph vessels, movement of these fluids comes from skeletal muscles movements.
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The human circulatory
system is both open and closed
Fig 42.3
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Fig 42.3
The human circulatory system is both open and closed
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The human circulatory
system is both open and closed
Fig 42.3
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Nutrients, Waste, O
2,
CO2, Water,
Minerals, etc must be transported throughout the body
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CO2 + H2O C6H1206 + O2
CO2 + H2OC6H1206 + O2
light
sugar
sugar
Photosynthesis
Cellular Respiration
ATP
energy
ADP
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Nutrients, Waste, O
2,
CO2, Water,
Minerals, etc must be transported throughout the body
![Page 22: Today: Circulation and Respiration Exam 2 T 4/5 in class (bring cheat sheet) Take-home 2 due 4/5 in class.](https://reader031.fdocuments.in/reader031/viewer/2022032805/56649eeb5503460f94bfc219/html5/thumbnails/22.jpg)
Fig 42.28
Gases move by diffusion:Only from high to low concentration
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hemoglobin
Hb is carriedinside red blood cells Hemoglobin
(a protein) carries oxygen in the blood
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Fig 42.24
The Respiratory System:large surface area to maximize gas exchange
~100m2 in humans
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Fig 42.24
Gas exchange occurs in alveoli
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In the lungs, O2 diffuses into the blood, and
CO2 diffuses out into the lungs.
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How is oxygen delivered to where it is needed?
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By adjusting blood flow…
Fig 42.15
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Fig 42.30By changes in blood pH
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CellBlood
Lung
CO2
O2Cellular
Respiration
Hb in RBC
CO2
O2
Hb in RBC
Low CO2
High O2
Fig 42.30
O2
O2
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CellBlood
Lung
CO2
O2Cellular
Respiration
Hb in RBC
CO2
O2
Hb in RBC
Low CO2
High O2
CO2+H
2O
=H2CO
3(carbonic acid)
(lesscarbonic acid)
Fig 42.30
O2
O2
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Fig 42.29b
Changes in blood pH, change binding affinity of hemoglobin
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CellBlood
Lung
CO2
O2Cellular
Respiration
Hb releases
O2 at lower pH
CO2
O2Hb can
bind O2
Low CO2
High O2
CO2+H
2O
=H2CO
3(carbonic acid)
(lesscarbonic acid)
Fig 42.30
O2
O2
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Exam 2 T 4/5 in class (bring cheat sheet)Take-home 2 due 4/5 in class