Hello fellow user!
99% of our body is made up of oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus.
0.85% of us is made up of potassium,sulfur<span>, sodium, chlorine, and </span>magnesium<span>.
Hope this helps! Cheerio and have a lovely day.
-Hannah</span>
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Question 6:
D. None of the above
BECAUSE
— In this situation, no use of the immune system (the system that fights off sicknesses) is being used, so we can immediately eliminate A.
— In this situation, no use of the endocrine system (the system that creates hormones) is being used, so we can immediately eliminate B and C.
Question 7:
A. Endocrine, Reproductive, Nervous
BECAUSE
— In this situation, we are definitely using the endocrine system because we are talking about hormones and the endocrine system creates hormones. We can eliminate C because the endocrine system is not included.
— In this situation, we are using the reproductive and nervous system because we talk about the ovaries and testes (reproductive) and the pituitary gland (makes hormones and testosterone) which is part of the brain and the brain is part of the nervous system. We can eliminate B because it doesn’t include these and eliminate D because A is our answer.
Question 8:
D. Integumentary, Circulatory, Immune
BECAUSE
—In this situation, we can eliminate B and C because we are not using the endocrine system (makes hormones)
—In this situation, we can eliminate A because we are not using the nervous system (brain, nerves, spinal cord)
Answer:
The correct answer is c. osteons, lamellae
Explanation:
An osteon is the basic functional unit of the cortical bone of a tubular bone. An osteon consists of a central canal that contains two vessels of Havers. Concentric bony laminae are arranged around this canal. These lamellae consist of bone cells and the surrounding base substance. Between the Havers canals there are Volkmann canals that connect the Havers canals. The construction of the cortical bone in these functional units has not yet been fully clarified. In general, it is assumed that these structures serve primarily to deliver tissue and signal transduction. This structure is also supposed to serve the stability and adaptability of the bone.