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19 Cards in this Set
- Front
- Back
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What are common ancestors?
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The ancestors shared by two or more organisms so they similar characteristics.
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What are organs?
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Several groups of tissues working together to carry out a particular function in the body. For example the heart is an organ that pumps blood to the lungs and around the body.
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What are the three types of blood vessels?
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Arteries, capillaries and veins
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What do capillaries do?
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Connect arteries and veins, carry both oxygenated and deoxygenated blood.
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What does the pulmonary artery do?
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Carries oxygenated blood to the lungs.
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What does the pulmonary vein do?
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Carries deoxygenated blood to the left atrium of the heart.
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What does the vena cava do?
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Transports deoxygenated blood into the right atrium in the heart.
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What s a percentile?
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A comparison of how big someone is compared to a group
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Why are their gaps in the fossil record?
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Destroyed, speed, decayed and discovered (dead slug died dreadfully)
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What do arteries do?
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Carry oxygenated blood away from the heart.
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What are platelets?
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Are tiny fragments of cells that are important in making blood lot if you cut or damage your blood vessels. They form a scab which stops microrganisms getting into the body and do not have a nucleus.
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What are the four components of blood?
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Plasma, red blood cells, white blood cells and platelets
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What do red blood cells contain and what does it do?
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They contain the red pigment haemoglobin which combines eversibly with oxygen to form oxyhaemoglobin. Oxyhaemoglobin is transported in the red blood ells around the body to the tissues where oxygen is released so that tissue cells have oxygen for aerobic respiration. It has no nucleus but has a large surface area to make space for as much haemoglobin as possible.
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What do veins do?
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They carry deoxygenated blood to the heart and have valves to stop the backflow of blood.
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What do white blood cells do?
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They are part of the body's deence against disease, tthey create antibodies which are prteins that bind microorganisms that cause disease and destroys them. They all have a nucleus.
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What does the aorta do?
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Carries oxygenated blood around the body
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What is growth?
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An increase in size (e.g. elognation and/or number of cells.
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What is plasma?
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A yellow liquid that transports dissolved substnces such as carbon dioxide, food substances and hormones
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What is the process in which blood travels around the body?
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The deoxygenated blood arrives at the heart through the vena cava and fills the right atrium. the atrium contracts forcing the blood through the valves to the right ventricle. The ventricle wall contracts forcing the blood out through more valves into the pulmonary artery. The blood returns to the heart through the left atrium in the pulmonary vein. Heart contracts and forces the blood through the valves in the left ventricle. Once full of oxygenated blood, the ventricle wall contracts so blood is forced out through more valves in the aorta.
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