B3 Transporting Materials

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  • Created by: KAustria
  • Created on: 06-05-14 22:02
What does the human circulatory system consist of?
1. Blood vessels 2. the heart 3.Blood
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What is the heart?
The heart is a muscular organ which pumps blood around the body. It is 2 pumps held together.
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What do the right atrium and ventricle do?
The right pump forces deoxygenated blood into the lungs
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What does deoxygenated blood do at the lungs?
The deoxygenated blood loses carbon dioxide and gains oxygen.
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Explain how oxygen travels around the body
1. Deoxygenated blood picks up oxygen through diffusion in the aveoli 2. Oxygen and haemoglobin combine into oxyhaemoblogin 3. The red blood cell travel to the tissues which need oxygen 3. The oxyhaemoglobin separate to form oxygen and haemoglobin
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What does the left atrium and ventricle do?
The oxygenated blood returns back to this side of the heart where it is pumped to the rest of the body
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What is the upper half of the heart called?
The atrium
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What is the lower half of the heart called?
The ventricle
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In what veins do the blood enter the heart?
Left : Pulmonary Vein Right : Vena Cava
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In what arteries does blood leave the heart?
Left : Aorta Right: Pulmonary Artery
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What are the purpose of the valves?
The valves in the heart prevent the blood from flwoing in the wrong direction.
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What arteries supply the heart muscle with oxygenated blood?
Coronary arteris
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What are the function and features of the arteries?
1. Carry the blood away form the heart 2. Have thick walls containing muscle and elastic tissue
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What are the function and features of the veins?
1. Have thinner walls than the arteries 2. Have valves along their length to prevent backflow.
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What are the function and features of the capillaries?
1. Are narrow and thin which means it has a short diffusion path 2. Carry the blood through the organs and allow the exchange of substances.
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If blood vessels are blocked or two narrow, what are the 2 ways in which to solve this?
1. Stents 2. Artificial or animal valaves
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What do stents do?
Stents are metal grids which can inserted into the artery to maintain blood flow and open up the blood vessles
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Blood is a tissue. What makes up blood?
Plasma -> 1. Red blood cells 2. White Blood Cells 3. Platelets
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What does blood plasma do?
1. Transport substances form the organs to the lungs 2. Transports small products from digestion form the small intestine to other organs 3. Transports urea from the liver to the kidneys
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What are the features and functions of the red blood cells?
1. They are biconcave discs with no nucleus 2. They contain a red pigment called haemoglobin 3. Haemoglobin combines with oxygen to form oxyhaemoglobin 4. Carries the oxyhaemoglobin to the organs where t splits to oxygen and haemoglobin
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What are the features and functions of white blood cells?
1. Have a nucleus 2. Part of the body's body fence system against microorganisms
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What are the function and features of platelets?
1. Do not have a nucleus 2. Are small fragments of cells 2. Help blood to clot at the site of a wound.
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Why is plasma given to patients?
To increase the volume of the bloodd
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Name an artificial blood
Perfluorocarbons
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Give an advantage to Perfluorocarbons?
They do not contain cells so matching is not necessary
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What are the main 4 disadvantages to Perfluorocarbons?
1. Expensive 2. Do not carry as much oxygen as whole blood 3. Insoluble in water so do not mix well with blood 4. Cause unpleasant side effects.
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What are the advantages of an artifical heart?
1. No need for immunosupressant drugs 2. No need for tissue matching
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What are the disadvantages of an artificial heart?
1. Blood clotting 2. Long stays in hospitals 3. Expensive
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What is the function of the xylem?
Transports water and mineral ions from the roots to the stem,leaves and flowers
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What is the function of the phloem?
Carried dissolved sugars from the leves to the rest of the plant, including growth regions and the storage organs.
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What is the movement of water form the roots through the xylem called?
The transpiration stream
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Other cards in this set

Card 2

Front

What is the heart?

Back

The heart is a muscular organ which pumps blood around the body. It is 2 pumps held together.

Card 3

Front

What do the right atrium and ventricle do?

Back

Preview of the front of card 3

Card 4

Front

What does deoxygenated blood do at the lungs?

Back

Preview of the front of card 4

Card 5

Front

Explain how oxygen travels around the body

Back

Preview of the front of card 5
View more cards

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