If they live in a river, they would most likely need fins (to swim) and gills (to breathe under water)
Hope this helps!
Answer:
Cell membranes are composed primarily of fatty-acid-based lipids and proteins.
Explanation:
There is the digestive system is used to help you digest food.
The respiratory system that lets us use and brain oxygen.
Lastly, the circulatory system which allows our bodies to have flowing blood.
Answer:
it is the thymus
Explanation:
this is where the t cells and b cells are made
Is there a list to pick from
