uses energy to change carbon dioxide and water into glucose and oxygen.
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Word equation for photosynthesis
carbon dioxide + water - light = glucose + oxygen
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The circulatory system
The circulatory system is made up of the heart, blood vessels and blood humans have a double circulatory system - two circuits joined together
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In the first circulatory system
the right ventricle pumps deoxygenated blood to the lungs to take in oxygen. The blood returns to the heart.
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In the second circulatory system
The left ventricle pumps oxygenated blood around all the other organs of the body. The blood gives up its oxygen at the body cells and the deoxygenated blood returns to the heart to be pumped out to the lungs again
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Red blood cells
The job of red blood cells is to carry oxygen from the lungs to all the cells in the body. They do not have a nucleus this allows them to carry more oxygen. They contain a red pigment called haemoglobin.
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Arteries
The heart pumps the blood out at high pressure so the artery walls are strong and elastic. They contain thick layers of muscle to make them strong, and elastic fibres to allow them to stretch and spring back.
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Capillaries
They have a thin wall only one cell thick, very small lumen.
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Veins
Capillaries eventually join up to form veins. The blood is at lower pressure in the veins so the walls don't need to be as thick as artery walls. They have vales to keep the blood flowing in the right direction.
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Enzymes
Starch, proteins and fats are big molecules. They're to big to pass through the walls of the digestive system, so digestive enzymes break these big molecules down into smaller ones like sugars eg - amino acids, glucose and fatty a
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Respiration - aerobic
requiring oxygen for a long amount of time eg - long distance runners
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Respiration - anaerobic
less oxygen is used this used by non endurance athletes
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Communicable disease
Pathogens are microorganisms that enter the body and cause disease. They cause communicable disease - disease that can easily spread. Both plants and animals can be infected by pathogens.
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Communicable bacteria
Bacteria are very small cells which can reproduce rapidly inside your body. They can make you feel ill by producing toxins that damage your cells and tissues.
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Communicable bacteria
Bacteria are very small cells which can reproduce rapidly inside your body. They can make you feel ill by producing toxins that damage your cells and tissues.
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Other cards in this set
Card 2
Front
carbon dioxide + water - light = glucose + oxygen
Back
Word equation for photosynthesis
Card 3
Front
The circulatory system is made up of the heart, blood vessels and blood humans have a double circulatory system - two circuits joined together
Back
Card 4
Front
the right ventricle pumps deoxygenated blood to the lungs to take in oxygen. The blood returns to the heart.
Back
Card 5
Front
The left ventricle pumps oxygenated blood around all the other organs of the body. The blood gives up its oxygen at the body cells and the deoxygenated blood returns to the heart to be pumped out to the lungs again
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