29) why would some cells in our immune systems survive decades?

4. how does a phospholipid behave in water? the phosphate head does not mix with water; the fatty acid tails do. the phosphate head and the fatty acid tails mix with water. the phosphate head and the fatty acid tails do not mix with water. the phosphate head mixes with water; the fatty acid tails do not.

Name the organs of humanelemintary canal.

Can someone i have no idea of how to do this.