What is the question exactly??
Meromelia(Malformed limbs): The critical period
is 20-36 days after fertilization or the first trimester when the
organs are just beginning to develop. Drugs such as thialides should be
avoided.<span>
Cleft Lip with/without Cleft Palate: Usage of drugs such as topiramate
and valproic acid, during the first 3 months of gestation increases the
risk of having a baby with this defect.
Enamel Hypoplasia(teeth enamel is hard but thin): The use of tetracyclines
can cause this, as well as yellow-to-brownish discoloration of the teeth.
It is important to avoid such drugs during the 2nd and 3rd trimesters.</span>
B) internal since it’s WITHIN the body
Hello!
Could be either:
<span>The action or process of observing something or someone carefully or in order to gain information.
</span>
Or
<span>A remark, statement, or comment based on something one has seen, heard, or noticed.
</span>
And in Science:
<span>An 'observation' in the scientific sense, is when you make a measurement or evaluation of some sort. You would usually make a note of how something has changed sine the previous ovbservation. Maybe the temperature has changed: gone up one degree; or a crystal has grown: maybe it is now .1 centimeters longer.
"Observations" usually implies that you are watching some process, and either measuring or noting the change that has taken place. usually you will also want to note the time of the observation, so that you can have an idea of how quickly (or slowly) the changes are occurring.
</span>
Hope this All Helps (Hope it did)! Have A Wonderful Day! :)
Deoxygenated blood leaves the heart and goes to the lungs and then re-enters the heart.