Which comparison is correct? The spinal cord is like a highway, and the nerves are like the roads that branch off the highway.
The spinal cord is like an information center, and the nerves are like the news broadcasts from it.
The spinal cord is like the insulation inside a wall, and the nerves are like the outer shell of the wall.
The spinal cord is like a power generator, and the nerves are like the power lines connected to it.

A

Explanation:The spinal cord is the road or big nerve that connects all the other roads/nerves.

well say a good goal is to do 150 sit ups in a week! or 90 pull ups a day. even 60 push ups in a month these are all fair goals!

during longer space exploration trips, crewmembers may develop vision impairment risks and short-term cardiac atrophy or a decrease in the size, strength, weight, and activity of the heart during space flight because they can experience microgravity. in addition, the long-term medical condition is loss of bone mineral density and radiation exposure.