Perch have paired pectoral and pelvic fins, and two dorsal fins, the first one spiny and the second soft. These two fins can be separate or joined.
Answer:
Capillaries connect the arteries to the veins. The arteries deliver oxygen rich blood to the capillaries, where the exchange for oxygen and carbon dioxide occurs.
Explanation:
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Answer is A. I kid chemistry a while back but I am pretty certain it is A.
A: no
In barium examinations, you want to see if something it's obstructing, like the colon. You only use a front view.
B: yes
When you want to see if everything it's alright about the spine, you need to analyze the curvature, and for that, you need front and side view.
And, is the only radiographic tool that can be done in antero-posterior and lateral views.
C: no
When you are looking for trauma or bone breakage, you may need only a side view or front view.
D: yes
If you are looking for any trauma or emergency, you need different positions of the bone to discover any breakage.
A: has a specific active site
