Yes smoking damages your lungs and slowly kills you
Sometimes prenatal testing leads a doctor to believe that a baby has a problem that may not exist and this misdiagnosis is often referred to as a prenatal effect.
<h3>What is Prenatal?</h3>
This is defined as the period in which an individual is pregnant and is characterized by a lot of differences in the body structure and the functioning of the body systems.
Thus period comes with a lot of care which is referred to as prenatal care in which the weight, urine and other physical examination are done sop as to ascertain the health status of the mother and child.
However, sometimes prenatal testing leads a doctor to believe that a baby has a problem that may not exist and the misdiagnosis is usually as a result of the prenatal effect due to the body's slight deviation from normal.
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Answer:
1. Electrical impulses in the heart cause the muscle to contract.
2. To keep the blood flowing in only one direction
Explanation:
In the first question, the correct answer is ''Electrical impulses in the heart cause the muscle to contract''. Every muscle in our body contracts because of electrical impulses and this is also true for our hearts. Or any hearts in nature that we know of.
In the second question, the answer is ''To keep the blood flowing in only one direction''. We have those valves and without them, we wouldn't be able to function as we do.
The main purpose of the reproductive system in organisms on earth is to enable an organism to make more of its kind.