<span>1. Smooth functioning of nerves-Calcium is key in helping nerves transmit messages across cells in the body.
2. Clotting of blood-Calcium helps in the clotting function of blood
3. Aids the contraction of muscles-Our muscles make use of calcium to aid them in contracting during the course of normal muscle functions.</span>
it is important for the skills to have hole thought the bone because it is used to relieve pressure on the brain when fluid, such as blood builds up and starts to compress bone tissues
A difference between coelom and Pseudocoelom is that the gut of a pseudocoelom is surrounded by the endoderm, and the gut of a coelomate is surrounded by the ectoderm. So your answer is D.
