1. The heart muscle cells need plenty of oxygen and nutrients so it needs its own blood supply.
2. The heart needs to have a blood supply to get ride of wastes.
Hope that helps. -UF aka Nadia
The continental crust is
A.composed mostly of granite
B.up to 6km thick
C.formed quickly -cooled lava
D.made of rock 2 million years old
i say the answer is D.
<span>The ligament is a soft, flexible supportive tissue that is replaced by bone during ossification. Most of the athletes have ligament injuries because of the four ligaments in our knees that can easily be injured. Ligaments are essential for they connect our organs.</span>
