Earthworms amnion.........................................................
starfish bony skeleton.......................................................
Answer:
The muscles should not be dissected at the points of origin and insertion due to the fact that the cell structures present here are a typical in nature .
Explanation:
The origin is where the muscle joins the stationary bone. The insertion is where it joins the moving bone. ... At the bone, the fibres of the tendon are embedded in the periosteum of the bone. This anchors the tendon strongly and spreads the force of the contraction, so the tendon won't tear away easily.
The point straight overhead on the celestial sphere for any observer is called the zenith and is always 90 degrees from the horizon. :) I hope this helped !
