01/29 Flashcards
The cardiovascular system ensures adequate perfusion, which is the
Rate at which blood is transported throughout the body
What happens when the heart contracts?
The blood moves
What are three types of blood vessels?
- Arteries
- Veins
- Capillaries
What are arteries?
Blood vessels that carry blood away from the heart
What are veins?
Blood vessels that carry blood towards the heart
Most veins carry deoxygenated blood except for
Pulmonary veins
What are capillaries?
Microscopic blood vessels in which exchange occurs
Capillaries can exchange where?
- Between blood and alveolus
- Within body tissues
What is the function of the right side of the heart?
It delivers O2 poor blood to the lungs
What is the function of the left side of the heart?
It takes O2 rich blood and pumps it to body tissues
What are the Great Vessels?
Blood vessels that are attached directly to the heart
Arteries and veins are examples of
Great vessels
What is the Pulmonary Trunk?
Artery which carries blood out to the lungs
What is the Aorta?
Artery that carries blood to the body
What are the Superior and Inferior Vena Cava?
Veins that deliver blood into right atrium
What are pulmonary veins?
Veins that carry blood from the lungs and back to the heart
What are the two types of Valves?
Semilunar and Atrioventricular valves
Where is the Atrioventricular valve found?
Between the atria and ventricles
Where is the Semilunar valve found?
Between ventricles and either pulmonary trunk or aorta
What happens in the Pulmonary Circuit?
Blood goes from the right side of the heart to lungs, where it gets oxygenated, and goes back to the left side of the heart
What happens in the Systematic Circuit?
Takes blood from the left side of the heart out to body tissues, and then back to the right side of the heart
The heart is located in the
Thoracic cavity
How is the left lung since the heart is found more on the left side?
It is a bit smaller than the right in order to make room for the heart
The oral cavity is linked by a
Mucus membrane
All body membranes open to the exterior are all
Lined by a mucus membrane
Closed body cavities are lined by
Serous membranes
Heart is surrounded by
A double-layered membrane called the visceral pericardium
Pericardial cavity has serous fluid, which allows for
Membranes to easily slide past one another
What are the layers of the heart wall?
- Epicardium
- Myocardium
- Endocardium
What is the epicardium?
Visceral layer of pericardium
What is the Myocardium?
Cardiac muscle cells
What causes for the heart to beat?
The contraction of the myocardium
What lines the heart chamber?
Endocardium
What are the two chambers in the heart?
- Atria
- Ventricles
What is the function of the atria?
They receive blood
What is the function of the ventricles?
They push out blood into the Aorta and Pulmonary Trunk
What is the function of the Right atrium?
It receives O2 poor blood from systemic circuit from inferior and superior vena cava
What is the function of the Left atrium?
It receives O2 rich blood from the pulmonary veins
What blood comes into the right ventricle?
Right atrium blood
What blood comes into the left ventricle?
Left atrium blood
Which ventricle is thicker?
The left
What prevents the mixing of blood?
Septum
Right AV valve is known as
Tricuspid
Left AV valve is known as
Bicuspid
