Answer:
1. when groups if tissues work together they are called organs. some examples of organs are the heart , lungs, skin, and stomach when organs work together they are called systems .
2. There are 11 systems in the human body ;
> muscular system
> respiratory system
> digestive system
> integumentary system
> skeletal system
> circulatory system
> urinary system
> repruductive system
> nervous system
> lymphatic system
> endocrine system
3. If a lot of water leaked into the building walls. It's support system would be damaged. like a buildings system your body system have to work together.
4. They are called tissues , the word "tissue " comes from latin word meaning to weave . Cells that make up tissues and sometimes woven together.
Explanation:
thats my answer...
