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Biology - Coggle Diagram
Biology
Heart
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deoxygenated blood moves through the right ventricle which pumps it to the lungs via the pulmonary artery
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the left ventricle has a much thicker wall than the right ventricle because it needs a lot more muscle as it is pumping blood around the whole body at high pressure. Where as the right is just pumping it to the heart at a lower pressure
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Thermoregulation
If your body temperature rises as high as 107.6°F (42 °C), you can suffer brain damage or even death.
if your body temperature falls to 95°F (35°C) or lower, you have “hypothermia.” which can potentially lead to cardiac arrest, brain damage, or even death.
It is a process which allows your body to maintain it's core internal temperature, even when the external temperature of the environment is much different.
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functions of blood
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Plasma is blood without the blood cells carries almost everything around your body that needs transporting
plasma carries
red, white blood cells and platelets
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kidneys
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nephrons are filtration units in the kidneys. Each kidney contains thousands of nephrons this is what happens when blood passes through them
Ultrafiltration
Blood from the renal artery flow through the glomerulus ( a ball of capillaries at the start of the nephron
high pressure squeezes water, urea, ions, and glucose out of the blood and into the bowman's capsule
then the membranes between blood vessels in the glomerulus and the bowman's capsule act like filter so that big molecules like protein and blood cells are not squeezed out
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osmoregulation
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ADH
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ADH makes the collecting ducts of the nephrons more permeable so more water is reabsorbed back into the blood
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Osmoregulation is a mechanism called negative feedback which means that if the water content gets too high then a mechanism will be triggered that brings it back to normal
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nervous system
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central nervous system
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when receptors in the sense organs (tongue, ears, etc) detect a stiulus the send a electrical impulse along sensory neurones to the CNS
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the eye
eye labels
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rods are more sensitive in dim light but cant detect colour. cones are sensitive to colours but not good in dim light
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iris reflex
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message is sent from light receptors along a sensory neurone to the brain which sends a message to a relay neurone to a motor neurone which tells circular muscles in the iris to contract making the pupil smaller
opposite happens in dim light the brain tells the radial muscles to contract making the pupil bigger
focusing on objects
far away objects
ciliary muscle relaxes, allows suspensory ligament to pull tight this makes lens go thin so it refracts light by smaller amount
close objects
ciliary muscle contracts which slackens the suspensory ligaments the lens become fat and more curved which increases the amount that the light refracts by
Homeostasis
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conditions in the body need to be steady for the body to function properly eg. water content ned to keep a balance between water gain and water loss
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