By definition a cylinder is a solid geometric figure with straight parallel sides and a circular or oval cross-section. A good example of a cylinder would be a soda can.
The one abt respiration the answer is the first one and circulatory system is the last one that says “delivery molecules …”
Answer:
the highest is "A" and the lower is "C"
Answer:

Browser
Browser: A software application used to locate and display Web pages. The two most popular browsers are Microsoft Internet Explorer and Netscape Navigator