2280429
Description
Mind Map by zainabzahid98, updated more than 1 year ago
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Created by zainabzahid98
about 9 years ago
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Control of heartbeat
- Myogenic
- means it can contract and relax without recieving signals from nerves
- start in the SAN(wall of the right atrium)
- SAN is like a pacemaker-it sets the rhythm of the heartbeat by sending out regular waves of electrical activity to the atrial walls
- This causes the right and left atria to contract at the same time
- A band of non conducting collagen tissue prevents it from being passed on to the ventricles
- Instead, they're transferred from SAN to the AVN
- the AVN then pases it on to the B.O.H
- BUT,theres a slight DELAY before the AVN does this, to make sure the atria completely empty before the ventricles contract
- The B.O,H is a group of muscle fibres responsible for passing the waves to the finner muscle fibres called PRKYNE fibres.
- The PRYKNE fibres then carry these waves into the muscular walls of the right and left ventricles-causing them to contract simutaneously
- The PRYKNE fibres then carry these waves into the muscular walls of the right and left ventricles-causing them to contract simutaneously
- The B.O,H is a group of muscle fibres responsible for passing the waves to the finner muscle fibres called PRKYNE fibres.
- BUT,theres a slight DELAY before the AVN does this, to make sure the atria completely empty before the ventricles contract
- the AVN then pases it on to the B.O.H
- Instead, they're transferred from SAN to the AVN
- A band of non conducting collagen tissue prevents it from being passed on to the ventricles
- This causes the right and left atria to contract at the same time
- SAN is like a pacemaker-it sets the rhythm of the heartbeat by sending out regular waves of electrical activity to the atrial walls
- start in the SAN(wall of the right atrium)
- means it can contract and relax without recieving signals from nerves
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