Week 1 - Lesson 2 (Part 1) Flashcards
What is the circulatory system?
A system of connecting arteries and veins
What does the circulatory system allow?
The heart to move blood from the systemic to pulmonary circulation and back
What is the systemic system between?
The heart and the rest of the body
What is the pulmonary system between?
The heart and the lungs
What cavity is the heart located in?
The thoracic cavity
Where is the heart situated between?
The lungs
What is the heart posterior to?
The sternum
Where is the heart located?
In the middle of the mediastinum
- 3/4th intercostal space
What is the heart enclosed in?
A pericardial sac
What kind of fluid is in the pericardial sac?
Serous fluid
- 10-20ml
What does serous fluid help the heart with?
Lubrication for beating
How many chambers does the heart have?
4
Where is the apex of the heart?
At the top of the left ventricle
What are the superior borders of the heart?
The atria chambers
What is the lower border of the heart?
The apex
- blunt end
What are the 2 atria chambers known as?
The collecting chambers
What are the 2 ventricle chambers known as?
The pumping chambers
How many valves does the heart have?
4
What are the 4 valves of the heart? (2)
- 2 atrioventricular valves
- AV valves - 2 semilunar valves
- SL valves
What do valves do?
They maintains uniform direction of blood flow
Where is the AV valves located?
Between the atria and the ventricles
What are the 2 AV valves?
- Tricuspid valve
- right side - Bicuspid valve
- left side
What is another word for the bicuspid valve?
Mitral valve
How many leaflets is the tricuspid valve?
3
How many leaflets is the mitral valve?
2
What are the 2 SL valves?
- Aortic valve
2. Pulmonary valve
How many leaflets does the SL valves have?
3
Where is the SL valves located?
Between the ventricles and the great vessels
