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Rat Dissection Presentation: Circulatory System

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by

Shelly King

on 26 March 2014

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Transcript of Rat Dissection Presentation: Circulatory System

Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Family: Muridae
Genus: Rattus
Species: Rattus Norvegicus
Evolutionary Information
Rat Taxonomy
Rat Dissection Presentation: Circulatory System
BY: Michelle, Desiree, Kea, and Dechen

Urban and Rural environments
Wooded areas
Sewers
Homes
Rat Habitat
Diet differs according to species
House rat: consumes anything digestible
Brown rat: omnivorous but prefers carnivorous diet such as insects, bird eggs, snails, and fish
Rainforest species including Sulawesian white tailed rat: fruits and seeds within.
Rat Diet
Eagles
Haws
Owls
Snakes
Cats
Dogs
Rat Predators and Descend
Overview of Circulatory System
The major organ of the circulatory system in rat are the heart, blood vessels and blood. The circulatory system functions to deliver oxygen, nutrients, and hormones to all the cells of the body.
What are the major organ of the circulatory system in rats and how do they contribute to its overall function?

Pulmonary circulation carries blood through the lungs for oxygen and then back to the heart. Systemic circulation moves blood through the body after it has left the heart.
Describe the pathway of the circulatory system of the rat, how does it work?
The circulatory system helps by pumping oxygen and rich blood to the heart and body. It also helps remove waste and carbon dioxide in the blood.
How does circulatory system help with the rat’s survival?
Genus Rattus native to continental Asia and the Island of Southeast Asia
Relative: Mice and Gerbils
Comparison To The Human System
1.)Both homesapiens and Rattus Norveicus circulate their blood through a closed circulatory system called the cardiovascular system. Both have four-chambered heart, seeing as they are both mammals. Both use blood to transport nutrients, wastes, water, oxygen, and carbon dioxide throughout the body. The rat's circulatory system is smaller in size. Rat has a caudal artery that brings blood to the tail. This is absent in humans.
2. (Human comparison cont.
2.) The circulatory system is the body's transport system. It's make up of organs that transport blood throughout the body. The heart pumps the blood and the arteries and veins transport it. Oxygen-rich blood leaves the left side of the heart andenters the biggest artery, called the aorta. The aorta branches into smaller arteries., which then branches into even smaller vessels that travel all over the body. When blood enters the smallest blood vessels, which are called capillaries, and are found in body tissue, it gives nutrients and oxygen to the cells and takes in carbon dioxide, water, and waste. The blood, which no longer contains oxygen and nutrients, then goes back to the heart through veins. Veins carry waste products away from cells and bring blood back to the heart, which pumps it to the lungs to pick up oxygen and eliminate waste carbon dioxide.
3. Human comparison cont.
3.) I did not find any major differences between a rat circulatory system and human circulatory system. The general structure of the circulatory system of the rat is almost identical to that of humans. But the digestive systems are different. A rat does not have gallbladder and lastly rats hearts are smaller compared to humans and beats faster.
Conclusion
1.) Why is the rat a great model to use for medical research?
-They have a similar body system as humans and they are intelligent, more than mice.
Are there limitations or ethical concerns for using rats in research?
2.) The body size of the rat is not the same as a human so doing the research, you may not be able to duplicate the process to get the correct end results.
Why don't we use primates in medical research?
We do. It is currently being used for research at Northwestern Hospital. They use primates for medical and drug research.
If we test a specific drug or product on a rat and it's safe, does that necessarily mean it's safe for humans to use?
Yes, because the FDA (Federal Drug Administration) does their own research before it's released to the human population, then after their research is released to the medical doctors.
Discussion
5.) Yes, they should be used research because its a way t o reduce the population, for example, the horse population gets overpopulated, they end up shooting the horses or put them down. It's a way to control their population and a critical way to obtain medical and drug research to help the humans to sustain a somewhat livable life through medicine/research.
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