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Nataly_w [17]
3 years ago
6

Ralph 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. Determine the blood vessel being observed.
Biology
2 answers:
Ulleksa [173]3 years ago
7 0
Vein because they have valves to prevent back flow of blood.
Cloud [144]3 years ago
5 0
I think the correct answer for this would be the veins. Ralph is observing a vein since he notices  that the vessel contains blood and<span> which is the function of the veins - to carry blood around the body. Hope this answers the question. Have a nice day.</span>
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hammer [34]

THE EXCRETORY SYSTEM

Answer: The attachment shows the nephron which is the functional unit of the kidney.

It does the work of urine formation through 3 distinct processes.

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3 years ago
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GREYUIT [131]

Answer: C. cropping patterns

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sergey [27]

Answer:

Verdadero

Explanation:

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malfutka [58]
Animal dander would be the answer you're looking for. 
 
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If this answers your question:
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