Blood and Lymphatic System Flashcards
Blood Volume
5-6L (Males) and 4-5L (Female) 250-350ml (Newborn
Viscosity
3.5-4.5x thicker
Color
scarlet (oxygen rich) to dull red or purple (oxygen poor)
pH
7.35-7.45 (average of 7.40)
Specific gravity
whole blood 1.045-1.066
serum 1.024-1.028
plasma 1.025-1.029
venous blood
7.35 / arterial blood 7.45
FUNCTIONS OF BLOOD
- Respiratory
- Nutritional
- Excretory
- Buffering action
- Maintenance of constant body temperature
- Transportation of hormones and other endocrine
secretion that regulates cell function - Body defense mechanism
HEMATOPOIESIS
- Blood cell formation
- Occurs in red bone marrow
- All blood cells are derived from a common stem cell
(hemocytoblast) - Hemocytoblast differentiation
- Lymphoid stem cell produces lymphocytes
- Myeloid stem cell produces other formed elements
(EPO)
Erythropoietin
(TPO)
Thrombopoietin
(G-CSF)
Granulocyte CSF
(GM-CSF)
Granulocyte-macrophage CSF
Salmon colored biconcave disk; anucleate ; literally, sacs of hemoglobin; most organelles have been ejected
Erythrocytes
White blood cells or WBCs
Leukocytes
Cytoplasm stain pale pink and contains fine granules, which are difficult to see; deep purple nucleus consist of three to seven lobes connected y thin strands of nucleoplasm
Neutrophils
Red coarse cytoplasmic granules; figure-8 or bilobed nucleus stains blue-red
Eosinophils
Cytoplasm has a few large blue- purple granules; U- or S- shaped nucleus with constrictions, stains dark blue
Basophils
Cytoplasm pale blue and appears as thin rim around nucleus; spherical dark purple- blue nucleus
Lymphocytes
Abundant gray-blue cytoplasm; dark blue-purple nucleus often kidney shaped
Monocytes
Essentially irregular shaped cell fragments; stain deep purple
Platelets
The main function is to carry oxygen
* Biconcave disks
* Essentially bags of hemoglobin
* Anucleate (no nucleus)
ERYTHROCYTES (RED BLOOD CELLS)
- Iron-containing protein
- Binds strongly, but reversibly, to oxygen
- Each hemoglobin molecule has four oxygen binding sites
- Each erythrocyte has 250 million hemoglobin molecules
Hemoglobin
respond to a lower than normal oxygen concentration in the blood by releasing the hormone erythropoietin.
Kidneys
travels to the red bone marrow and stimulates an increase in the production of red blood
cells (RBCs).
Erythropoietin
manufactures RBCs from stem cells that live inside the marrow.
The red bone marrow
squeeze through blood vessel membranes to
enter the circulation
RBCs
work to supply continuous movement and oxygenation of RBCs.
heart and lungs
destroyed primarily by the spleen.
Damaged or old RBCs
is to respond rapidly to microbial invasion to kill the
invaders (phagocytosis)
neutrophils
- Cytoplasmic fragments of megakaryocytes
- Important in HEMOSTASIS
PLATELETS
Series of complex processes by which the body spontaneously stops bleeding and maintains blood on its fluid state within the blood vessel compartment.
HEMOSTASIS
oxygen carrying capacity of blood is reduced
Anemia
Inability to successfully eliminate foreign substances
Qualitative
- Leukocytosis
- Leukopenia
Quantitative
A. Thrombocytopenia
B. Thrombocytosis
Platelet Disorders
A. Hemophilia
B. Thrombophilia
Coagulation Disorders
LYMPHATIC SYSTEM
Two parts
- Lymphatic vessels
- Lymphoid tissues and organs
Lymphatic system functions
- Transport fluids back to the blood
- Play essential roles in body defense and resistance to disease
- Absorb digested fat at the intestinal villi
excess tissue fluid carried by lymphatic vessels
Lymph
- Site where transport system begins
- Remarkably permeable
Lymphatic capillaries
- Next area where the lymph flows from the lymphatic
capillaries
Lymphatic collecting vessels
- Formed by the union of the largest collecting vessels
- Named mostly from the regions from which they
collect lymph
Lymphatic trunks
drains lymph from
Right Lymphatic duct
receives lymph from the rest of the body except right side of head, neck, thorax, and upper extremities
Thoracic duct
collects lymph fluid from 2 lumbar trunks which drains the lower limbs and intestinal trunk that drains digestive organs
Cisterna chyli
LYMPH TRANSPORT Maintained by
- Skeletal muscle contraction
- Pressure changes in the thorax
is prevented by valves
Backflow
may spread through the body via the lymphatic stream
Pathogens and cancer cells
- Distributed along the lymphatic vessels where lymph is filtered and antibodies are added
Lymph Nodes
are strategically located inside for immune response
Lymphocytes
has a fibrous capsules
cortex and medulla
contains primary follicles of lymphocytes
Cortex
medullary cords containing lymphocytes and macrophages with spaces called medullary sinuses
Medulla
- Prominent in newborns and continues to increase in size during childhood
- Located in the superior mediastinum (in front of great vessels of heart
Thymus
densely packed lymphocytes
Cortical
fewer lymphocytes
Medullary
like structures called Hassall’s/Thymic corpuscles
With cyst
- “graveyard for aged and defective blood cells”
- Largest lymphoid organ
Spleen
- Small masses of lymphoid tissue around the pharynx (Waldeyer’s Ring)
Tonsil
located on either side at the posterior end of the oral cavity
Palatine Tonsil
posterior wall of the nasopharynx
Pharyngeal Tonsil
base of the tongue
Lingual Tonsil
- Acts as a guard to protect respiratory and digestive tracts
- Tonsils, Peyer’s patches, small accumulations of lymphoid tissue
MALT (Mucosa Associated Lymphatic Tissue
- Large isolated clusters of lymph nodules found in the ileum
- Macrophages here destroy bacteria, preventing them from reaching the intestinal wall
Peyer’s Patches or GALT (Gut Associated Lymphatic Tissue)
- The ability to resist damage from foreign
substances
Immunity
first and second line of defense
Non-specific
third line of defense
Specific
- Non-specific
- Natural
- 1st and 2nd line
- No memory
- Cellular: phagocytes, monocytes, Natural Killer (NK) cells, mast cells
- Humoral: Complement, Cytokines
INNATE
- Specific
- Acquired
- 3rd line
- Has memory
- Cellular: B cells, T cells, Antigen- Presenting Cells (APCs)
- Humoral: Antibodies, Complement,
Cytokines
ADAPTIVE
-Mucous membrane
-Secretions of Skin and Mucous membrane
FIRST LINE - Skin
-Phagocytes
-Antimicrobial proteins
-Inflammatory
response
SECOND LINE
-Lymphocytes
-Antibodies
THIRD LINE
Prevents spread of injurious agents to adjacent tissues
* Local inflammation: response confined to a specific area
Inflammatory Response
Cardinal Signs
- Rubor
- Dolor
- Calor
- Tumor
- Functio Laesa
distributed throughout the body
Systemic inflammation
matures in thymus
* Involved in cell-mediated immunity
* Antigens must be presented by macrophages to an immunocompetent T cell
(antigen presentation)
T-cells
stimulate the proliferation of other T cells and of B cells bound to an antigen
Helper T-cells
directly attack and destroy infected cells and cancer cells
Cytotoxic T-cells
terminate normal immune responses by releasing
suppressor factors
Suppressor T-cells
matures in the bone marrow
* Involved in humoral immunity
* Matures as plasma cells
B-cells
when antigens bind to the receptors of B-cells
Primary immune response
other clone members become memory B-cells
Secondary immune response
what has been introduced to the individual is the antigen
Active Immunity
infective agent will gain entry to the body, act as stimulant for antibody formation because the organism acts as antigen.
Naturally acquired active immunity
when the antigen has been deliberately introduce like injecting vaccines, they act as antigen to stimulate antibody formation.)
Artificially acquired active immunity
when what has been introduced to the body is already
antibodies
Passive Immunity
exhibited by the transfer of antibodies from mother’s placenta to the fetus and transfer of antibodies from breast milk to the baby.
Naturally acquired passive immunity
injection of artificially prepared substance like immune serum of gamma globulin. These two are antibodies
preparation
Artificially acquired passive immunity
- reacts with antibodies
- Self antigen or Foreign antigen
Antigens
- Proteins (immunoglobulins)
- Binds to antigens or invaders and kill/inactivate them
Antibodies
- Globulin proteins that react specifically with the antigen that stimulated their production
Immunoglobulins
- produced after exposure to genetically different
or non-self antigens of the same species
Alloantibody
- produced in response to self antigen
Autoantibody
- Crosses the placenta and weakly activates
complement system
IgG: 75% of Ig’s
- In serum is a monomer and in secretions is a
dimer - Found in secretions: tears, saliva, colostrum,
mucus
IgA: 15% of Ig’s
- Largest and exists as a pentamer
- Most potent activator of complement
IgM: 7-10% of Ig’s
- Exists as a monomer
- Mediates allergic and parasitic reaction
IgE: less than 1% of Ig’s
- Present in the membrane of mature B cells
- Modulation of immune response
IgD: less than 1% of Ig’s
Production or function of immune cells or
complement is abnormal
Immunodeficiencies
AIDS
Acquired Immune Deficiency Syndrome
- The immune system does not distinguish between self
and nonself - The body produces antibodies and sensitized T
lymphocytes that attack its own tissues
Autoimmune Diseases
white matter of brain and spinal cord are destroyed
Multiple sclerosis
impairs communication between nerves and
skeletal muscles
Myasthenia gravis
destroys pancreatic beta cells that produce insulin
Juvenile diabetes
destroys joints
Rheumatoid arthritis
affects kidney, heart, lung and skin
Systemic lupus erythematosus (SLE)