100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
Previously searched by you
AQA A-Level Biology required practical 5: Dissection of animal or plant gas exchange or mass transport system or of organ within such a system$9.99
Add to cart
Unit 3 - Organisms exchange substances with their environment
Other
AQA A-Level Biology required practical 5: Dissection of animal or plant gas exchange or mass transport system or of organ within such a system
31 views 0 purchase
Course
Unit 3 - Organisms exchange substances with their environment
Institution
AQA
AQA A-Level Biology required practical report with data and citations
required practical 5: Dissection of animal or plant gas exchange or mass transport system or of organ within such a system
Unit 3 - Organisms exchange substances with their environment
All documents for this subject (165)
Seller
Follow
laibalsx
Reviews received
Content preview
Required Practical 5
Dissection of a Mammalian Heart
Dissection of animal or plant gas exchange or mass transport system or organ within
such a system.
The heart is a pump that is a part of the double circulatory system so blood can travel
around the body providing oxygen+nutrients as well as carrying away waste such as carbon
dioxide. The heart is composed of cardiac tissue with four chambers: left and right atrium
and left and right ventricle. The left side carries oxygenated blood around the body and the
right side receives deoxygenated blood.
The aim of this experiment is to identify/investigate the external and internal features of a
mammalian heart.
Safety precautions need to be ensured including wearing adequate hand and eye protection
( gloves, goggles), a lab coat/apron and caution while handling a scalpel and/or scissors.
Experiment
Begin by examining the exterior and finding the coronary arteries and if possible the valves
in the aorta and the pulmonary artery. Then use the scalpel to cut open the left atrium and
ventricle and the right atrium and ventricle. You will then be able to see the tendinous cords
which hold onto the atrioventricular valves. You will find that the walls of the atria are much
thinner as they do not need to pump as hard-they are only pumping blood to the ventricles.
On the other hand ventricles have thicker, muscular walls to enable bigger contraction,
furthermore it is thickest near the cardiac base. You can either use pins and sticky
notes or take images and edit them to label it.
Disposing
All equipment should be put in a beaker with disinfectant. The apron-if plastic-gloves
and heart etc should go in a disposal bag. The surface used should then be cleaned
with disinfectant spray.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller laibalsx. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.99. You're not tied to anything after your purchase.
