Answer:
Explanation:
The most primitive tool I used today was the hammer. The hammer is age long in the history of household tools. It is used to hit in nails into walls or woods.
The most advanced tool I have used today is the mobile phone. This is a tool of the 21st century which makes communication easier and faster.
<span>The spinal cord is the foremost road for message attaching the brain and external nervous system.</span>
The body's spinal cord is preserved through the osseous spinal string pointed to the left side. The spinal string is produced of osseins named vertebrae / the backbone. Despite the spinal string is slightly adjustable, few of the vertebrae in the inferior segment of the spinal string displays wick.
Swim bladder I believe
Hope this helps