An introduction is the first set of information it is found at the beginning of your portfolio. The goal of your introduction is to explain to the reader what the
topic is about and what your portfolio is all about. Your introduction lets your
readers know what you hope to achieve and what they can expect from your
assignment.
The introduction is a brief paragraph which should be not be longer than one (1)
paragraph.

Which action would best students ask a teacher for an assignment extension?

How can a person  best  reduce the risk of injuries on the road?  

Check all that occur during ventricular systole. a. the av valves open to allow blood to enter the ventricles from the atria. b. the av valves open to allow blood to enter the ventricles from the atria. c. the semilunar valves remain closed throughout systole to prevent backflow of blood into the ventricles. d. the semilunar valves remain closed throughout systole to prevent backflow of blood into the ventricles. e. the semilunar valves open to allow blood to flow into the large arteries. f. the semilunar valves open to allow blood to flow into the large arteries. g. the av valves close to prevent backflow of blood into the atria.