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If you are considering law (or right now do) a rat dissection v your students, don’t forget to include a compare anatomy aspect to the lab. The rat’s human body structure and organ equipment are relatively similar come those the a human. This similarity offers an amazing look into mammalian anatomy and permits students to make comparisons in between humans, rats, and other mammals. Prior to your students begin cutting, have them study the outside anatomy to garner clues about the organism’s habitat and behavior, and also how people compare.

Content standards

National Science education Standards This task is ideal for middle and also high school students and addresses the adhering to content standards:

grades 5–8: Life Science: structure and duty in living Systems; Regulation and also Behavior; Diversity and Adaptations of Organisms grades 9–12: science as Inquiry: Abilities necessary to execute Scientific Inquiry qualities 9–12: Life Science: Matter, Energy, and also Organization in life Systems; actions of biology

AP® Biology course topics

Organisms and Populations: Diversity that Organisms; structure and duty of Plants and Animals

Before you start

Students are frequently eager to start cutting and also forget around observing the exterior features that the organisms theyare dissecting. Take time to aid them explore the exterior anatomy. There space many clues to one organism’s habitat that students can uncover by examining the outside features. Coming before your rat dissection activity, generateclass conversation by using several of the questions provided below. Answers will vary depending on students’ priorknowledge the rodent characteristics and also anatomy.

Pre-dissection questions

Where carry out rats live? What carry out rats eat? perform rats be afflicted with live young? perform at least 3 methods in which rats are similar to humans. Explain a rat’s foot structure and for what it can be useful.

Materials

Figure 1. Rat outside anatomy.

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Procedure

Review number 1 and also position it wherein you can refer come it throughout the activity. place the specimen on a dissecting tray and observe the exterior anatomy that the rat. Note: Double-injected specimen might exhibit blue and/or red colours in the 2 locations where skin was cut away. This colour is from latex injected right into the vascular device to enable simplified to know of the specimen’s veins and arteries. research the rat, observing that from all angles. Manipulate your specimen’s limbs and note the organism’s articulation. Open up the mouth and also observe the rat’s dentition. Try to situate the following structures: Head Nares1 Ear (pinna) Whiskers (vibrissae) Eyes, each with remnant the nictitating membrane (plica semilunaris) woman structures and also openings Urethral orifice1 Vagina1 Anus1 masculine structures and openings Urogenital opening1 Anus1 Scrotum1 Feet Claws Foot Pads

Extend

Use the students’ result from this external examination to support or disapprove the answers come the questions above. Permit the students to justify their answers in one open class discussion. This task is great way to assist enhance observational and reasoning skills.

Now your students are prepared to learn about the rat’s inner anatomy—andbarisalcity.org’s Rat Dissection BioKit® is a good resource to teach the anatomy the this specimen. The complete kit contains 15 double-injected barisalcity.org"s Perfect Solution®white rats, plus a comprehensive teacher’s manual with dissection instructions, extension activities, reproducible college student sheets, lift information, glossary of terms, and dissection concerns for discussion.

1. Item labeling on figure 1.


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