Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
14 Cards in this Set
- Front
- Back
|
Describe blood according to its tissue type
|
Blood is a connective tissue whose cells are suspended in liquid called plasma.
|
|
|
Describe major function of blood.
|
Functions of blood include transporting substances between body cells and the outside, maintaining homeostasis and protection.
|
|
|
Define the term hematology
|
Hematology is the study of blood, blood-forming tissues and the disorders that affect them.
|
|
|
Name the average volume of blood in a human.
|
Blood volume varies from individual to individual, but the average volume (70 kg male) is 5 liters.
|
|
|
Name the two major components of blood and the percentage of each by weight.
|
Solid cells or "formed elements" (45%), which is composed mainly of red blood cells.
a. Quantitation of this portion of blood represents the hematocrit (HCT) reading or packed cell volume (PCV). Liquid plasma (55%), which contains water, electrolytes, hormones, wastes, proteins and much more |
|
|
Name the three types of human blood cells
|
red blood cells, white blood cells, and platelets
|
|
|
Provide the common and scientific name for each blood cell type.
|
Red Blood Cells (RBC) = Erythrocytes
White Blood Cells (WBC) = Leukocytes Platelets = thrombocytes |
|
|
Hemoglobin
|
protein (globin) + heme (iron)
|
|
|
Why do mature cells lack nuclei?
|
are anucleate, leaving more room for hemoglobin/oxygen;
|
|
|
RBC Count
|
The number of rbc's/mm3 blood.
Average RCC = 4 million-6 million rbc's/mm3 |
|
|
Average life-span of RBC's
|
120 days
|
|
|
What destroys RBC's
|
Liver and spleen macrophages destroy worn rbc's
|
|
|
Production (Erythropoiesis) of RBC's
|
In fetuses = yolk sac, liver, spleen;
In adults = red bone marrow; B12, folic acid, and iron are all needed. |
|
|
Hemoglobin
|
Hemoglobin is broken into globin and heme,
Iron in Hb is recycled, Heme is broken into biliverdin > bilirubin > bile. |
