Amelia’s doctor says that she has a tapeworralph is looking at a blood vessel under a microscope as part of his study about the cardiovascular system. he notices that the vessel contains blood and has valves. what is the blood vessel that he is observing? m. which type of medicine is prescribed to amelia?

a- multicellular

b-eukaryotic

c-no cell wall

d-heterotrophic

e-autotrophic

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]