Ch7 - blood lymph and immune sys Flashcards
colloid
a liquid containing suspended particles
most are plasma proteins
matrix
substance that surrounds and protects cells, manfacture by cells and holds cells together
root - nutrit
nourishment
nutrient
constituent of food necessary for the body to funciton normally
plasma
fluid noncellular component of blood
platelet (thrombocyte)
small particle involved in the clotting process
serum
fluid remaining after removal of blood cells and the formation of a clot
functions of blood
1 maintains bodys homeostasis
2 transports nutrients, vitamins and minerals
3 transports waste products
4 transports hormones
5 transports gases
6 protects against foreign substances
forms clots
hematocrit (Hct)
percentage of total blood volume composed of red blood cells.
hemoglobin (Hb)
main component of red blood cells.
red from “heme”
functions of RBC (erythrocytes)
1 transport oxygen
2 transport carbon dioxide
3 transport nitric oxide
leukocytes
white blood cells
erythrocytes
red blood cells
types of white blood cells
granulocytes
agranulocytes
granulocyte
contains granular cytoplasm made up of granules which are sites for enzyme and chemical production.
types of granulocytes
neutrophils - ingest bacteria fungi and some viruses
eosinophils - enter tissue undergoing allergic reaction
basophils - migrate to damaged tissue realasing histamine and heparin
types of agranulocyts
monocytes - largest blood cells, become macrophages that ingest bacteria, dead neutrophils, and dead cells in the tissue
agranulocyte
a white blood cell without any granules in its cytoplasm
hemostasis
the control of bleeding
platelets (thrombocytes)
have no nucleus, are fragments of large bone marrow cells, aid in clotting
hemostasis process
Vacular spasm - constriction of injured blood vessels
platelet plug formation - plateltes bind themselves together to adhre the surrounding tissues
blood coagulation - forms a clot through prothrombin to thrombin to fibrin
fibrin
stringy protein fiber that is a component of a blood clot
antigen
substance capable of triggering an immune response.
molecules that exist on the surfaces of red blood cells
antibodies
protein produced in response to an antigen
present in the plasma, can combine with only a specific antigen
types of antigens
ABO - blood group system
Rh - rhesus
allergen
substance creating a hypersensitivity reaction
tonsils
masses of lymphatic tissue located at the entrance of the uper throat that entrap inhaled or ingested pathogens
adenoids
similar to tonsils, located on posterior wall of upper pharynx
immunoglobulin
specific protein evoked by an antigen
bodies defense mechanisms
1 physical - skin mucous membraines hair
2 humoral - antibodes
3 cellular - lymphocytes
characteristics of immunity
specificty
memory
discrimination
immunity
the state of being able to resits specific infectious disease