Biolog - The Heart

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What are the 2 types of blood?
Oxgenated (high concentration of oxygen), arteries from heart, bright red colour & Deoxygenated (low concentration of oxygen), veins to the heart, dark red/purple colour.
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Why keep oxygenated and deoxygenated blood seperate?
Efficient-ensures there is a steep concentration gradient between the blood in the capillaries and the air in the alveoli of the lungs. Increases the rate of diffusion. Oxygenated blood can then be sent under high pressure-more areas covered quickly.
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Why does the heart have muscular walls?
To retract and pump blood around the body. Muscular contractions forces blood through the heart.
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Why is the muscular wall on the left side of the heart thicker than the right?
Because the left side (ventricle) of the heart has to pump blood to the rest of the body, so it has to work harder, therefore it needs to be thicker.
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Where to atria pump blood to?
The Ventricles
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What do ventricles do?
They contract to pump blood out of the heart under high pressure.
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What kind of blood does the RIGHT ventricle pump and where to?
Deoxygenated blood to the lungs.
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What kind of blood does the LEFT ventricle pump and where to?
Oxygenated blood to the rest of the body.
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Why are their ventricles in the heart?
To prevent the backflow of blood.
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What is blood made up of?
Red blood cells, White blood cells, Platelets and Plasma.
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What is the function of the ateries, veins and capillaries?
The arteries carry blood away from the heart, the veins bring blood back to the heart. The veins contains valves to stop the backflow of blood. And the capillaries are thin walled tubes that carry blood into and out of our tissues (diffiusion occurs)
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Name at least 4 substances that are carried/dissolved in the plasma
1.Glucose, 2. Amino Acids, 3. Fatty Acids, 4. Vitamins
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What is haemoglobin? Whats its function?
Haemoglobin is a red pigment that carries oxygen. Haemoglobin is a large protein which contains iron and is found in red blood cells.
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What is the relationship between haemoglobin and oxyhaemoglobin? When does each one occur/exist in the body?
In high ocygen concentration such as in the lungs the haemoglobin reacts with oxygen to form oxyhaemoglobin.
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What is artificial blood?
A man made substance to mimic some functions of blood.
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What are the symptons of Corony heart disease?
Fatigue (tiredness), high blood pressure, dizziness and heart murmur/palpitations.
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Why does the temperature of our body need to be controlled?
Need to have enzymes working at their optimum temperature, if not they will denature, then respiration won't take place, therefore your body cells will stop working and will shut down.
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Other cards in this set

Card 2

Front

Why keep oxygenated and deoxygenated blood seperate?

Back

Efficient-ensures there is a steep concentration gradient between the blood in the capillaries and the air in the alveoli of the lungs. Increases the rate of diffusion. Oxygenated blood can then be sent under high pressure-more areas covered quickly.

Card 3

Front

Why does the heart have muscular walls?

Back

Preview of the front of card 3

Card 4

Front

Why is the muscular wall on the left side of the heart thicker than the right?

Back

Preview of the front of card 4

Card 5

Front

Where to atria pump blood to?

Back

Preview of the front of card 5
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