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
