Vertebrates have closed circulatory systems their blood flows through blood vessels like veins and arteries and they have a heart to push the blood around the body. thats why the human circulatory is a closed system
Answer:
both
Explanation:
If there is an option I prefer both
Which of the following is a barrier to effective communication?
A. using excessive amounts of jargon
B. communicating while physical distractions are present
C. using an incorrect communication channel
<u>D. all of the above</u>
* I just took the test and D is the correct answer.
There are differences between having a sprained muscle in the ribs, or a broken rib. A broken rib tends to be more painful, may or may not protrude and can cause extreme swelling and bruising. A muscle strain will have bruising, swelling and pain but it will not protrude and will be less severe.
