Blood Flashcards
Blood is a ___
connective tissue with fluid matrix
Formed elements of blood
- Red blood cells (erythrocytes)
- White blood cells
(leukocytes) - Platelets
(thrombocytes)
Plasma
Fluid portion containing ions, hormones, glucose, etc
Hematocrit
% of blood volume composed of erythrocytes
Normal % of RBC
males: 42-65%
female: 38-46%
red blood cells make up what percentage of a centrifuge sample?
45%
Plasma makes up what percentage of a centrifuge sample?
55%
Buffy Coat
-thin white layer in the middle
-1% composed of platelets and white blood cells
Blood pH is maintained ___
7.35 - 7.45
normal temperature measured rectally is?
100.4 F
Average blood volume for males and females
Males: 5-6L
Females: 4-5L
blood functions
transport
regulates
protection
transport function
transport O2, CO2, nutrients, and waste
regulation functions
regulates temperature, pH, and fluid balance
blood protection functions
white blood cells destroy pathogens and clotting cascade prevents loss of blood
What is plasma made up of?
90% water
Albumins 58%
Gobulins 37%
Fibrinogen 4%
Alumins
58% of plasma
acts as transport protein for some hormones and lipids
Globulins
37% of plasma
includes antibodies
Fibrinogen
4%, important in clotting cascade
Colloid osmotic pressure
plasma protein for retaining water in blood by osmotic pressure
blood is formed in?
red bone marrow
Erythropoiesis
-formation of red blood cells
-regulated in kidneys
-requires iron, vitamin b, and amino acids
Leukopoiesis
-formation of white blood cells
-stimulated by chemical frm bone marrow
Thrombopoiesis
formation of platelets
molecule that combines with oxygen for transport in RBC?
hemoglobin
life span of red blood cells?
120 days
old erythrocytes are destroyed ?
spleen
Norma RBC count?
4-6 million
Anemia
-decreased ability to transport oxygen
-low RBC
High RBC count is called?
Polycythemia
