Blood Flashcards
three interrelated components of the CVS
blood, heart and blood vessels
The branch of science concerned with the study of blood, blood-forming tissues, and the disorders associated with them is
hematology
a liquid connective tissue that consists of cells surrounded by a liquid extracellular matrix
Blood
The extracellular matrix is called
blood plasma
the fluid that bathes body cells and is constantly renewed by the blood.
interstitial fluid
Blood has three general functions:
transportation, regulation, and protection
The temperature of blood is
38°C (100.4°F)
Blood pH
7.35 to 7.45 (average = 7.4)
laboratory analysis of the components of
blood
blood test
This is one of the most common blood tests and is often done as part of a regular checkup. It measures the number and size of red blood
cells, hemoglobin, and hematocrit; the number and percentage of each type of white blood cell in a sample of 100 cells (differential white blood cell count); and the number of platelets
Complete blood count
This refers to a group of tests that measure the levels of different chemicals in blood
Basic metabolic panel
These tests are used to determine the levels and activity of certain enzymes as indicators of
organ damage.
Blood enzyme tests
higher levels of creatine kinase and troponin indicate
damage to the heart and skeletal muscles
higher levels of ALT and AST indicate
liver damage
These are several tests that assess the risk of heart disease. Among the blood components measured are total cholesterol, HDL, LDL, and triglycerides
Lipoprotein panel
color of saturated with oxygen
bright red
The blood volume in adult male
5 to 6 liters (1.5 gal)
The blood volume in adult female
4 to 5 liters
Several hormones, regulated by negative feedback, ensure that blood volume and osmotic pressure remain relatively constant. Especially important are the hormone
aldosterone, antidiuretic hormone, atrial natriuretic peptide
Whole blood has two components:
blood plasma and formed elements
% of blood plasma in blood
55%
% of formed elements
45%
99% of the formed elements are
RBCs
Some of the proteins in blood plasma are also found elsewhere in the body, but those confined to blood are called
blood plasma protein
Hepatocytes (liver cells) synthesize most of the blood plasma proteins, which include the
albumin, globulin, and fibrinogen
Certain blood cells develop into plasmocytes that produce gamma globulins, an important type of globulin. These blood plasma proteins are also called
antibodies or immunoglobins
The formed elements of the blood include three principal components:
erythrocytes, leukocytes, and platelets
The percentage of total blood volume occupied by RBCs is called the
hematocrit
The normal range of hematocrit for adult females
38% to 46%
The normal range of hematocrit for adult males
40 to 54%
This hormone is present in much higher concentration in males than in females, stimulates synthesis of erythropoietin (EPO), the hormone that in turn stimulates production of RBCs.
testosterone
the percentage of RBCs is abnormally high, and
the hematocrit may be 65% or higher
polycythemia
The process by which the formed elements of blood develop is called
hemopoiesis
Blood from nutrient and metaphyseal arteries enters a bone and passes into the enlarged and leaky capillaries, called
sinuses
In order to form blood cells, multipotent stem cells in red bone marrow produce two further types of stem cells, which have the capacity to develop into several types of cells. These
stem cells are called
myeloid stem cells and lymphoid stem
cells
stem cells begin their development in red bone marrow and give rise to red blood cells, platelets, monocytes, neutrophils, eosinophils, basophils, and mast cells.
myeloid stem cells
stem cells, which give rise to lymphocytes, begin their development in red bone marrow but complete it in lymphoid tissues
lymphoid stem cells
Red blood cells live only about
120 days
Erythropoiesis, the production of RBCs, starts in the red bone marrow with a precursor cell called a
proerythroblast
a cell near the end of the development sequence ejects its nucleus and becomes
reticulocyte
may occur if too little oxygen enters the blood
hypoxia
artificially induced polycythemia
blood doping
Granular leukocytes include
neutrophils, eosinophils, and basophils
Agranulocytes include
lymphocytes and monocytes
monocytes and granular leukocytes develop from
myeloid stem cells
lymphocytes develop from
lymphoid stem cells
Because the granules do not strongly attract
either the acidic (red) or basic (blue) stain, these WBCs are neutrophilic
neutrophils
Because older neutrophils thus have several differently shaped nuclear lobes, they are often called
polymorphonuclear leukocytes, polymorphs or polyps
The granules are smaller than those of other
granular leukocytes, evenly distributed, and pale lilac
neutrophils
The large, uniform-sized granules within an
eosinophilic (= eosin-loving)—they stain red-orange with acidic dyes
eosinophil
The round, variable-sized granules are basophilic (= basic loving)—they stain blue-purple with basic dyes
basophilic
Its nucleus stains dark and is round or slightly indented. The cytoplasm stains sky blue and forms a rim around the nucleus
lymphocytes
Its nucleus is usually kidney-shaped or horseshoe-shaped, and the cytoplasm is blue-gray and has a foamy appearance
monocyte
These “cell identity markers” are unique for each person (except identical twins).
major histocompatibility (MHC) antigens,