the ileum

Question 1

it is very …. this allows time for d………. and a….. t……..of products of digestion

Answer 1

long
diffusion
active transport

Question 2

the lining is f….. into millions of projections called v….. these are then floded into many mic……. giving it are large s…….. a… for d……..

Answer 2

folded
villi
microvilli
surface area
diffusion

Question 3

the epithial cell is only . c… t…. so thers a s…. di…… di……

Answer 3

1 cell thick
short diffusion distance

Question 4

there is a rich bllod supply to the v…. this maintains the c………. g…….

Answer 4

villi
concentration gradient