Question

11.
the muscular system makes up about what percentage of the body’s weight?
worth 4.000 points.
a. 20 percent
b. 40 percent
c. 75 percent
12.
the heart, blood vessels and ___ vessels make up the cardiovascular system.
worth 4.000 points.
a. digestive
b. skeletal
c. lymph

Explanation:

Question 11

To determine the percentage of body weight the muscular system makes up, we refer to anatomical and physiological knowledge. The muscular system (including skeletal, smooth, and cardiac muscles) typically accounts for about 40% of an adult's body weight. Option A (20%) is too low, and option C (75%) is too high as other components like bones, fat, and organs also contribute to body weight.

The cardiovascular system consists of the heart, blood vessels (arteries, veins, capillaries), and lymph vessels? No, wait, the cardiovascular system is heart, blood vessels (for blood circulation). Wait, no—actually, the cardiovascular system is heart and blood vessels (transporting blood), while the lymphatic system has lymph vessels. Wait, no, the question might have a typo or a different approach. Wait, the cardiovascular system is heart, blood vessels (arteries, veins, capillaries) that carry blood. But the options: digestive vessels are part of digestive system, skeletal vessels don't exist as a main category. Wait, no—maybe the question is about the circulatory system which includes cardiovascular (blood) and lymphatic (lymph). So the cardiovascular system plus lymph vessels? No, the cardiovascular system is blood - related, lymphatic is separate. Wait, maybe the question is phrased as the circulatory system (cardiovascular + lymphatic), so the blank is lymph. So the heart, blood vessels, and lymph vessels make up the circulatory system (which includes cardiovascular and lymphatic). So the answer is C.

Answer:

B. 40 percent

Question 12