Boy in the plastic bubble
The process of blood clotting
Blood vessels damaged Presence of blood platelets,
Calcium ions, vitamin K, several blood clotting factors
Soluble fibrinogen insoluble fibrinogen form a meshwork,catching blood cells and seal off the
wound
Physical barrier e.g. skin
Chemical barrier e.g. gastric juice
White blood cells
pathogens
Latent period
Antigen presenting cells
T -helper cell
T-killer cell
B cell
Plasma cell
T -helper cell
lymphokines
T-suppressor cell
T-memory cell
Rh-ve mother
Her 1st Rh +ve child
Anti Rh antibody produced in mother
Contact of blood at birth
Her subsequent child will be acted on by the antibody
1. If the mother is Rh-ve and her first child is
Rh+ve.
Would the mother have problem ?
2. If the mother is Rh+ve and her first child is
Rh-ve.
I) Would the mother have problem ?
II) Would her subsequent children have problem ?
Compare this with the blue line depicting the mortality from infections since 1900. In the first 4-5 decades of the use of antimicrobial agents, there was a dramatic fall in the mortality from infections but since the mid-80's deaths due to resistant infections is slowly increasing.
AZT
(A)
(B)
A sulphonamide
PABA - a substrate required for the formation of bacterial cell wall
( PABA )
( protonsil )
The pathogenic bacteria unable to multiply
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