3 things I've done to get ready:
Neighborhood Chalkboard Nature Challenges
03/31/2020
https://www.inaturalist.org/ to become a "Citizen Scientist" ... stay tuned for more
You may want to start with the Amoeba Sisters: https://www.youtube.com/watch?v=3jwAGWky98c
Respiratory System is also known as the Pulmonary System
Circulatory System is also known as the Cardiovascular System
Size of Human Cells... about 200um or .0002m. (1um = 1X10-6)
What is cell tissue? specialized cells working together:
part 1 - https://youtu.be/r7_cFsSmYrk
