Question

please answer my question?​

Answer 1

Answer:

9)

(i) Langerhans

(ii) they release insulin which makes the suger concentration in the blood low

12) we get a muscular pain after streneous exercise becaus lactic acid is released

this makes our muscles painful.......as we do lot of work we don't get much energy at that moment and we get pain

13) valves are present in the veins helps in avoiding backward flow of blood

if they are absent then I blood flow backward and then it can't flow to all parts of the body and we become weak

I hope it helps you............

Answer 2

Answer:

i) Langerhans

ii) abcd