Answer:
B. found in every living thing
Explanation:
It decomposes it and returns the nutrients to the ground.
Firstly they are not membranes and they are villi's which increase the surface area during digestion
Red blood cells, also known as RBCs, red cells, red blood corpuscles, haematids, erythroid cells or erythrocytes, are the most common type of blood cell and the vertebrate's principal means of delivering oxygen to the body tissues—via blood flow through the circulatory system. RBCs take up oxygen in the lungs, or gills of fish, and release it into tissues while squeezing through the body's capillaries.
this is about red blood cells but what are you asking
Which one all of the or what
