Module 8 ML-2 Flashcards
What is the role of the CVS in homeostatsis
To be the main transport system
Nutrients to
GI system
O2/CO2 to
Resporatory System
Wastes to
Renal systel
Temperature to
Skin and muscles
Hormones to
endocrine system
Why do we need a circulatory system
because diffusion of solutes more than 100um or more would be to slow and inefficient for large multicelllular organisms
Heart
the biological pump; generates force to move the blood; electrical and mechanical
Blood;
the fluid connective tissue through which O2/CO2/wastes/nutrients and messengers like hormones are transported
Blood vessels:
the “tubing” through which the blood flows; they play and active role in movement of blood
What is the average total blood volume
5.5L
Plasma average
3.0L or 55-58% of the ECF
Buggy Coat
Has leukpcytes and platelets; insignificant volume
Erythrocyte (RBC) volume
averages 2.5L or 42-45%, also called the hematocrit
What are RBCs mainly involved in
gas transport
What is the order of things in the centrifuge tube
plasma, buffy coat, hematocrit–> heavier things on the bottom
Characteristics of Erythrocytes (RBC)
-biconcave disks
-large SA and small volume (important for rapid diffusion of gases)
-7um diametes
-Carry lots of hemoglobin
-Organelles are extruded (no DNA)
True or false; all blood cells start off as stem cells
True
Stem cells turn into 4 different cells
Reticulocyte
Megakaryocyte
Blast cells
Bone marrow lymphocyte precursor
Reticulocyte
RBC (oxygen transport)
Megakaryocyte
platelets (clotting)
Blast Cells
monocyte, neutrophil, eosinophil, basophil (WBCs, Immunity defense)
Bone marrow lymphocyte precursor
B and T (immunity defense)
What does “the heart is a dual pump” mean
RV and RA–> lungs
LV and LA–> out to systemic
Artery
carries blood away from heart
Vein
carries blood towards the heart
Perfusion
passage of blood through a vascular bed; blood moves by bulk flow from high to low pressure
True or false; vascular beds can be in parallel but also in series to pulmonary circulation
true
Capillary beds in series
As nutrients and oxygen moves through they slowly becomes less and less because blood is flowing through multiple capillary beds (one after another)
- wastes and co2 build up
Capillary beds in parallel
The quality of the blood is the same to all organs
-blood goes to each capillary bed at the same time so nothing is diminished and nothing builds up
