<span>It is true that the first trimester is the most critical time for an embryo or a fetus. This is because there are many crucial developmental stages in this time period in order to produce a viable and functional multicellular organism. Such developmental characteristics in this period include the successful formation of the notochord, the basic nerve structures and the beating heart. It is critical for such structures and organs to form properly in order to ensure subsequent developments in the fetus to form correctly and ultimately result in a successful deliverance.</span>
Answer:
d. 60
Explanation:
Both the American College of Sports Medicine and the U.S. Department of Health and Human Services recommend at least 60 minutes of exercise daily for youth under the age of 18. This has been determined to be a good daily dose of exercise in order to allow healthy growth and development of youth below the age of 18th. Which is also why Physical Education classes in the United States are mandatory and last 60 minutes.
Answer:
75 to 115 beats per minute
Answer:
Call a treatment service.
Confide in someone you trust.
Seek out a healthcare professional.