How does the circulatory and respiratory system work together to get oxygen to the body cells?

This is the amino acid cysteine. circle the amine group, put a box aroundthe carboxylic acid group and use a different colored pencil/pen to circle the sidechain (r group). h o | ||nh2— c- c-oh | ch2 | sh

During endocytosis, cells expel what they don't need take in what they need shrink due to loss of water

Where can you find prokaryotic and eukaryotic cells?