Lecture 14: Heart and Great Vessels Flashcards
What is the pump of the cardiovascular system?
The heart
What are the Conducting vessels of the cardiovascular system?
Arteries and veins
What are the sites for exchange with tissues in the Cardiovascular system?
Capillaries
Where is Drainage for excess tissue fluids in the Cardiovascular system?
Lymphatic vessels
What are the functions of the Cardiovascular system?
- Maintain homeostasis
- Transport
- Regulation of body temperature
What does the Cardiovascular system transport?
- Metabolites and wastes
- Hormones and signaling molecules
- dissolved gasses
- Cells involved in immune and inflammatory responses
What are the 2 Circuits in the Cardiovascular System?
- Pulmonary circuit to the lungs
* Systemic circuit to the rest of the body
Where does the heart reside?
In the Mediastinum
What is the Mediastinum?
A central region of the thorax within rib cage and bounded on the left and right by the lungs
Aside from the heart, what else does the Mediastinum contain?
- Esophagus
- Trachea
- Thymus gland
- Large blood vessels
What is the Sac that the heart sits in?
The Pericardium
What are the two layers of the Pericardium?
The outer Fibrous Pericardium and the inner Parietal Pericardium
What are the 3 layers of the heart from outside to inside?
Epicardium
Myocardium
Endocardium
What does Parietal Pericardium secrete?
Serous fluid that lubricates the surface between the heart the and pericardial sac
What kind of tissue is the Parietal Pericardium?
Mesothelium: Simple Squamous Epithelium
What is the Epicardium identical to?
The Parietal (serous) epithelium of the Pericardium
What is the Largest Layer of the heart tissue?
The Myocardium
Describe the surface of the Endocardium?
Nice and smooth
Where is the Apex of the heart?
At the bottom
Where is the Base of the heart?
Kind of near the top
Which side of the heart (Front/Back) is the the right atrium and right ventricle?
The front of the heart
What do the Superior and Inferior Vena Cava do?
Bring deoxygenated blood from the body into the right atrium
What does the Coronary Sinus do?
Brings deoxygenated blood from the heart to the right atrium
Which vessels lead into the Right Atrium?
- Inferior Vena Cava
- Superior Vena Cava
- Coronary Sinus