Cardiovascular System Flashcards
(12 cards)
Cordage Toendonae?
- support bicuspid and tricuspid valves
- attached to papillary muscles (ventricle floor)
- keeps valves from inverting during ventricular contractions
Name the structures of the heart
- Arota
- anterior vena cava
- posterior vena cave
- pulmonary trunk
- pulmonary arteries
- pulmonary veins
- coronary artery and veins
- right atrium
- tricuspid, artivontricular vale
- right ventride
- chordae tendinea
- semi-lunar vbe
- bicuspid-artivontricular valve
Ventricular contractions
•ventricle contract, forcing blood out •Force of blood opens outflow valves and closes inflow valves
Atrial Contractions
- Atria contract, forcing blood out
* force of blood opens inflow valves and blood enters ventricles
How does the heart beat?
An electrical stimulus is generated by the sinus node (also called sinoatrial node or SA NODE)
Won’t is the sinoatrial node?
It is a small area of specialized tissue in the right atrium
How many beats per minute is there in the heart?
60-190
What is another name for the SA node
Pacemaker
Where does the stimulus travel?
Down nevers
Name & describe two main divisions of automatic nervous systems:
Parasympathetic(inhibitory): nerves slow down heart rate & blood pressure Sympathetic nerves(stimulatory):speed up heart rate and increase blood pressure
Adrenalin has the same affect on the heart as..?
Sympathetic nervous system
Adrenalin is produced by..?
The adrenal gland
