If haemoglobin is replaced by haemocyanin,the blood will carry

$A$: $100 \; ml$ of venous blood contains $14.4 \; ml$ of $O_2$,meaning it is still $75\%$ saturated with oxygen under normal conditions.
$R$: About $4.6 \; ml$ of $O_2$,i.e.,$25\%$,diffuses from arterial blood into the tissues during resting conditions.

$A$ large proportion of oxygen is left unused in the human blood even after its uptake by the body tissues. This $O_{2}$

Approximately $97\%$ of $O_2$ is transported by $RBCs$. The remaining $3\%$ is transported by:

The process by which chloride ions pass into $R.B.C.$ and bicarbonate ions pass out is called

What happens to the oxygen-hemoglobin $(O_2-Hb)$ dissociation curve when the temperature decreases?