You should search that up in the internet
Answer:
Cardiovascular system
Explanation:
Cardiovascular means relating to the heart and blood vessels. Even though blood system sounds like an appropriate name, the circulatory system studies more than just blood, it studies the heat and blood vessels as well.
A good example of endosymbiosis is the mitochondria. Three pieces of evidence that suggest the mitochondria was not an original organelle in cells are:
1. They have their own membranes
2. They reproduce by pinching in half which is very similar if not the same to binary fission of bacteria
3. They have their own genomes which are passed off to the offspring.