analec finals Flashcards
Make sure that our body gets the oxygen, nutrients and other things it needs and gets rid of wastes.
Cardiovascular system
organ system that distributes blood in all parts of the body.
Cardiovascular system
the heart, blood, and blood vessels.
Cardiovascular system
functions of the cardiovascular system
- This system carries oxygen, nutrients, cell wastes, hormones and other substances.
- It plays an important role in helping the body meet the demands of activity, exercise, and stress.
- Protects the body against disease and infection.
-To help the body maintain a constant body temperature (‘thermoregulation ‘)
Your heart’s conduction system is the ???
network of nodes, specialized cells, and electrical signals that keep your heart beating.
TWO TYPES OF CELLS THAT CONTROLS HEARTBEAT
Conducting Cells - carries electrical signal.
Muscle Cells - control’s contractions.
carries electrical signal.
Conducting Cells
control’s contractions.
Muscle Cells
function of the heart conduction system
Your heart functions as a pump, propelling blood throughout your body with each beat. During each heartbeat, electrical signals traverse the conduction pathway of your heart. The process initiates with the sinoatrial (SA) node generating an excitation signal.
The (?) instructing them to contract
atria
(?) briefly pausing until the atria are emptied of blood
Atrioventricular (AV) node
The signal then travels along the (?) transmitting it to the purkinje fibers
bundle of his
convey the signal to your ventricles, prompting them to conract
purkinje fibers
The electrical signals in your heart make it beat by (?) and (?)
expanding and contracting.
The electrical signals in your heart make it beat by expanding and contracting. Basically, it helps keep your (?) and (?) based on what your body needs.
heartbeat steady and adjusts the speed
The (?), also known as heart’s natural pacemaker, is like a control center. It sends electrical signals that kickstart your heartbeat.
sinoatrial node
The sinoatrial node, also known as heart’s (?), is like a control center. It sends electrical signals that kickstart your heartbeat.
natural pacemaker
consistently delays the electrical signal from the SA node by a small fraction of a second. This deliberate delay ensures that your atria, the upper chambers of the heart, have enough time to empty their blood into the ventricles before the contraction cycle concludes.
ATRIOVENTRICULAR (AV NODE)
AUTONOMOUS NERVOUS SYSTEM.
SYMPATHETIC NERVOUS SYSTEM
PARASYMPATHETIC NERVOUS SYSTEM
Known for the “fight or flight” response, speeds up your heart rate by making the SA node work faster
SYMPATHETIC NERVOUS SYSTEM
Responsible for the “rest and digest” response, slows down your heart rate by making the SA node work slower.
PARASYMPATHETIC NERVOUS SYSTEM
(?) or the (?) acts as a crucial link in the heart’s communication system. It resembles a bridge made of nerve fibers extending from the AV node. It acts as a messenger, taking the electrical signal from the AV node and passing it along to the Purkinje fibers.
The bundle of His, or the atrioventricular bundle
The bundle of His, or the atrioventricular bundle acts as a crucial link in the (?).
heart’s communication system.
THE TWO BRANCHES OF BUNDLE OF HIS
LEFT BUNDLE BRANCH
RIGHT BUNDLE BRANCH
