The Heart - Ventricles and Anatomy Flashcards
1
Q
The circulatory system is _____. The gills are in line with _____.
A
- closed
- heart
2
Q
The heart has __ chambers
A
4
3
Q
What does it mean that the heart is a single circuit?
A
- in line
4
Q
What is the 1st chamber of the heart?
A
- sinus venosus (SV)
5
Q
What is the primary pump in the heart?
A
- atrium (A)
6
Q
What is the main pump of cardiac output?
A
- ventricle (V)
7
Q
What is the final heart chamber in elasmobranchs and lampreys?
A
- conus arteriosus
8
Q
The conus arteriosus is ____ (muscular) and has ____ valves.
A
- contractile
- conal
9
Q
What do teleosts have instead of the conus arteriosus?
A
- bulbous arteriosus
10
Q
What are 2 features of the bulbous arteriosus?
A
- non-contractile (not muscular)
- single bulbal valve
11
Q
The bulbous arteriosus has elastic ____ _____.
A
connective tissue
12
Q
What is the function of the elastic chamber?
A
- dampens pressure pulses to deliver more continuous flow (think of hose + hose with balloon and how it moved)
13
Q
Define windkessel action
A
- dampens pressure oscillation
- even flow to gill
