Suoerior and inferior vena cava → heart → Right chambers → lungs
→ left chambers → aorta
Arteries carry blood (with oxygen) from our heart out to your body, while veins carry blood (without oxygen) from your body to your heart. Arteries are strong, flexible blood vessels that are able to expand (get bigger) and contract (get smaller). They expand as your heart beats, and contract between heart beats. Veins are less flexible than arteries. They have valves (doors) that open and close to let blood through.
Answer:
1. dna needs to be replicated before mitosis so that the parent cell has the same amount of genetic material as the parent cell once it has split.
2. helicase is an enzyme that is so dna can unwind.
Explanation:
the explanation is in the answer.
I hope this helps!
Answer:
coronary arteries
Explanation:
Two major coronary arteries branch off from the aorta near the point where the aorta and the left ventricle meet. And they create a muscle with blood which is coronary arteries
