Answer:
These are needed to mimic the blood vessels which these organs will use for the supply or drainage of fluids e.g blood.
In addition the empty tunnels serve as the routes for nutrients and oxygen supply for the organ.
In summary the tunnels provided a vascular structure to support the organ
Explanation:
<h2>Answer:</h2>
Correct order from least greatest mass to greatest mass:
- Terrestrial
- ice giants
- Ice dwarfs
- Gas giants
<h3>Explanation:</h3>
The above given list contains the names of different planets depending upon their compositional characteristics. According to this list gas giants are heavier and then ice dwarfs and then ice giants.
Terrestrial which means planet earth is top on the list, which is lighter in weight than other planets.
C.
the skeletal muscles are attached to the bones which are partly controlled by the central nervous system.
It processes undigested food into feces
