A heart attack occurs when one or more of your coronary arteries become blocked. Over time, a coronary artery can narrow from the buildup of various substances, including cholesterol (atherosclerosis). This condition, known as coronary artery disease, causes most heart attacks.
A fetus is considered viable as early as 24 weeks.
<h3>Age of viability of fetuses</h3>
A fetus is formed from a zygote.
A fetus is considered viable when it can survive and become a normal human irrespective of whether it gets to the required gestation period before being delivered.
This period has been found to be as early as the 24th week after fertilization.
More on fetuses can be found here: brainly.com/question/7964921
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What are you talking about?
Answer:
I think B
Explanation:
Veins = blood we have them all over our body
