The immune system just like any other human body system cannot work independently of other body systems. Choose two other human body systems that
the immune system consistently interacts with to help maintain homeostasis.
O Digestive and Circulatory
O Muscular and Circulatory
O Digestive and Muscular
Lymphatic and Muscular

well the answer is 2!

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this