Cardiovascular system Flashcards
Where are the branchial arches located?
Between brain and heart
What cells form vascular arch?
Neural crest cells
What forms from anterior vascular arches?
Major arteries of head and neck
What forms from posterior vascular arches?
They link together to form aortic arch at junction with the heart.
Where are the heart endocardial tubes derived from?
Mesoderm
What is the pulmonary circuit?
How deoxygenated blood travels to lung and becomes oxygenated.
What is systemic ciruit?
Blood returning to heart and then being circulated to rest of body.
Steps of cardiac contraction cycle
Ventricular diastole - AV valves open SL valves closed
Atrial systole - AV valves closed SL valves open
Ventricular systole
Why do we use zebra fish as heart models?
Their hearts can regenerate by cardiomyocytes.
Steps of heart formation?
Cardiac looping and branchial arch fusion.
Ring constriction theory.
Aortic sack fusion with branchial arch vessels.
Valves form.
Atrium and ventricle fusion.
Cardiac pacemaker.
Ventricular septum forms
