Exam (elaborations)
OCR TRANSPORT IN ANIMALS.
- Institution
- A+ Depth Chemistry Paper H032_02 Solutions 2024
OCR TRANSPORT IN ANIMALS.
[Show more]
Seller
Follow
Content preview
OCR TRANSPORT IN ANIMALS*Single Circulatory System - ANSWER-Circulatory system where the blood only
passes through the heart once for each circuit of the body e.g. in fish: heart ->
gills -> body -> heart
Double Circulatory System - ANSWER-Circulatory system where the blood
passes through the heart twice for each circuit of the body. E.g. in mammals and
birds: heart -> body -> heart -> lungs -> heart
Open Circulatory System - ANSWER-Circulatory system where the blood is
pumped into an open space surrounding cells/tissues where exchange takes
place by diffusion then the blood drains back to the heart. e.g. in insects
*Closed Circulatory System - ANSWER-Circulatory system where the blood is
contained within blood vessels at all times. Exchange takes place at the
capillaries by diffusion.
Arteries - ANSWER-Blood vessels that carry blood away from the heart at high
pressure. It has a narrower lumen than a vein, a thick muscular wall, elastic
tissue and a folded endothelium.
Veins - ANSWER-Blood vessel that carries blood back to the heart at lower
pressure. It has a wide lumen, a thin muscular wall, smooth endothelium and
pocket valves that prevent the backflow of blood
Capillaries - ANSWER-Thin blood vessels that surround all cells for the
exchange of substances. The endothelium is one cell thick and they collectively
have a large surface area.
Tissue Fluid - ANSWER-Fluid (water and small molecules such as oxygen,
glucose and sodium ions) that is forced out of capillaries at high hydrostatic
pressure and surrounds respiring cells so that exchange of substances can take
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 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 denicetho. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £7.16. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
81113 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now