The lymphatic system destroy harmful substances 'By producing antibodies'.
The lymphocytes contained in lymphatic organs are produced with other defence cells by the bone marrow. They are then dispersed to eliminate pathogens.
The basic needs of all cells in the body are food and water. Just like any other organism, cells live of of nutrients and water collected in one way or another.
Hope this helps! : )
Where is the picture of the diagram
You can do the coral snake, as the coral snake has gained adaptations of
1. Venom to kill prey and protect itself
2. Have bright coloration to warn predators that it is toxic
3. Have a forked tongue in order to smell out prey