Full transcript
0:00in visualizing the components of blood
0:02let's start with the red blood cells
0:04remember our medical terminology science
0:06is in reference to cells erythro is red
0:10and so with a red blood cell it is small
0:13can only be seen really underneath the
0:16microscope uh does have the ability to
0:20last for 120 days every 120 days red
0:24blood cells actually go and restore
0:26themselves they are small enough to pass
0:29through capillaries and you can see here
0:32in the sectional view where it is
0:34concaved looks flat from the top but is
0:37more concaved and that helps with
0:39passageways through the capillaries also
0:42in the red blood cells it produces
0:44what's called red bone marrow a typical
0:48red blood cell count would be anywhere
0:50from 4 million to 6.5 million and we
0:54have two terms that are associated with
0:56your red blood cell count the first one
0:59there is anemia medical terminology
1:02email meaning blood a meaning absent or
1:05without so this would be a diagnosis of
1:07an individual that has an absent or a
1:10lowered amount of red blood cells next
1:12one down you have polycystinia and
1:15that's an increase in red blood cells
1:17now the increase in red blood cells
1:20could actually lead to a thicker more
1:22dense blood and could possibly lead to
1:24blood clotting here in the red blood
1:26cells components two more terms for you
1:29we have hematocrit and hemoglobin and in
1:32reference to hematocrit hematocrit is
1:34measuring the packed red blood cell
1:36volume
1:37which is normally about 45 percent of
1:40the full components of blood next one
1:43down you have hemoglobin hemoglobin also
1:46a test that measures the amount of
1:48oxygen that's inside the red blood cells
1:51that is distributed throughout the body
1:52and here you can see what normal blood
1:55would look like if we were to draw a
1:57sample of a blood specimen put it into a
2:00tube what we do is we centrifuge it we
2:03spin it down and as we spin it down
2:05we're able to look at the components the
2:07blood will separate and so a normal
2:09blood sample would look very similar to
2:12this starting at the top where you would
2:14see more of what's called plasma than
2:16anything else
2:17plasma is made up of water proteins
2:20excess glucose that's in the blood as
2:23well as any hormones going down in the
2:25middle you have what's called a buffy
2:27coat Buffy coat is where you're going to
2:29have leukocytes and platelets both of
2:32which we'll be discussing uh in just a
2:34few
2:35and then we have hematocrit at the
2:37bottom now hematocrit remember that's
2:39going to be your solid packed red blood
2:41cells
2:42and so with the term anemia absence or
2:45without this person has a decreased
2:47amount of red blood cells thus the
2:49amount of plasma has increased
2:53and if you flip that on the other side
2:54with polycythemia this is an individual
2:57who has an excessive amount of red blood
3:00cells so we're going to see more red
3:02blood cells and less Plasma in the
3:04sample