Dissection in biology provides a hands-on education above and beyond reading a textbook. By seeing, touching and exploring different organs, muscles and tissues inside an animal and seeing how they work together allows you to really understand your own body and appreciate the amazing world around us. And it's not hard - you can dissect a heart right at home using an inexpensive specimen with a dissection guide and simple dissection tools! Many doctors, surgeons and veterinarians report that their first fascination with the body started with a biology dissection class.
In today’s dissection, we’ll be looking at a sheep heart. Like humans, sheep have four-chambered hearts. Hearts are an essential organ--they pump blood through your body to keep you alive!
Materials:
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- Observe the external anatomy of the heart. See if you can locate the following:
- Right ventricle
- Left ventricle
- Coronary blood vessel
- Apex
- Auricles
- Superior vena cava
- Inferior vena cava
- Pulmonary vein
- Pulmonary artery
- Aorta
- Cut the heart following incisions 1-4 in the guidebook and see if you can locate the following:
- Left atrium:
- Aorta
- Mitral valve
- Chordae tendineae
- Trabeculae carneae
- Papillary muscles
- Right atrium
- Tricuspid valve
- Aortic semilunar valve
- Pulmonary semilunar valve
- Left atrium:
- Now, try to draw a diagram showing how blood flows into and out of the heart. How many of the parts we identified above can you include in your diagram?
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The word biology comes from the Greek word bios, which means life. The suffix –logy means “a subject of study or interest”.
So, biology is the study of everything that has to do with living organisms.
what is biology all about