Ans of que no.38? (3) Bile duct and oesophagus
(4) Fallopian tubes and urethra
OQ38. A large proportion of oxygen is left
unused in the human blood even after its
uptake by the body tissues.
This 02 :
(1) acts as a reserve during muscular exercise
(2) raise the pC02 of blood to 75 mm of Hg.
(3) is enough to keep oxyhaemoglobin
saturation at 96%
(4) helps in releasing more 02 to the
epithelial tissues.
Q39. An organism used as a biofertilizer for
g sovabean crops is :
