The circulatory system of the rat and humans:
Both the rat and humans have a 4 chambered heart, which includes 2 atria and 2 ventricles. The circulatory system consists of blood, the heart and blood vessels.
· Blood: connective tissue of liquid plasma and cells.
· Heart: a muscular pump that circulates blood.
· Blood vessels: include arteries, capillaries and veins that deliver blood to all tissues.
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Rat heart is located near the top of the animal. Human circulatory system, arteries are red, veins are blue. A: right atrium B: left atrium The atria collect blood from the veins C: Left ventricle D: Right Ventricle The ventricles pump blood out of the heart into the arteries  The digestive system of the rat and humans · The digestive system enables animals to break down food that they eat and obtain energy for other body processes. Two differences between rat and humans · Rats don’t have a gallbladder, whereas humans do. · The rat has a large cecum, which is designed to break down harsh foods that the rat ingests, humans still have a cecum but it is smaller in comparison to the rat. |
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