hi mam!gud pm.. im learned many things about biology. I learned in 2nd grading the circulatory system,parts of the plants,digestive system,nervous system,urinary system and excretory system.I learned the different kinds of blood and the function of the circulatory.I also learned the different parts of the digestive,nervous and urinary system and the function of it. I learned the diff. kinds of pants and the process of hypothesis.Im so glad when i learned all of that and i really interested to that topic.thanks mam for teaching us.