1. How many muscles are in the human body?
2.What diseases affect the muscular system?
3. What are the functions of the muscular system?
4.what are two types of muscle fibre?
D. Scientists use all of the above skills.
Explanation:
Los fósiles se forman a través de varios tipos de fosilización: mineralización, carbonización, momificación, y fundición y moldes. El proceso más común es el de mineralización, en el que los minerales de aguas subterráneas se filtran en las partes duras del organismo, como huesos y conchas, y los petrifican o los convierten en piedra.
Answer:
The answer is the accessory nerve.
Explanation:
We have 12 pairs of cranial nerves, the accessory nerve is the XI pair. This is responsible for the innervation of the sternocleidomastoid and trapezius muscles.
The fibers of the accessory nerve originate from neurons that are located in the upper spinal cord. These fibers join together forming roots and once the nerve is constituted, it enters the skull through the great hole that is located at the base of the skull.
Then, the nerve continues its path along the inside of the skull in the direction of the jugular hole and then leaves the skull next to the glossopharyngeal nerve (IX) and the vagus (X).
Thus, the accessory nerve enters and leaves the skull again, characterized by being the only cranial nerve which has this behavior.
