Introduction - Heart Dissection (L2) Flashcards
Cardiovascular system
Along with the lymphatic system, composes the vertebrate circulatory system.
Consists of the heart, blood, and blood vessels: arteries, capillaries, and veins.
Together, they transport materials between the different organs and tissues of the body, forming a network that is involved with all of the body’s functions.
Lymphatic system
Along with the cardiovascular system, makes up the vertebrate circulatory system
Heart
Vital to the system’s function. Works as the blood’s pump, producing and maintaining the flow of blood.
In vertebrates, develops as a folded tube of cardiac muscle.
Lined internally with endocardium and externally with epicardium, and divided into chambers with valves.
The cardiovascular system is divided into the…
Systemic and pulmonary circuits
The heart is divided into…
Two halves, with one atria and ventricle dedicated for each circuit.
The right side of the heart receives deoxygenated blood from the body and pumps it to the lungs via the PULMONARY CIRCUIT.
The left side receives the oxygenated blood from the lungs and pumps it to the rest of the body via the SYSTEMIC CIRCUIT.
Separation of systemic and pulmonary circulation…
Ensures that oxygenated and deoxygenated blood remain completely separate.
More importantly, the separation of systemic and pulmonary circulation allows the heart to work as a double pump, i.e., separate pumps for the systemic and pulmonary circuits.
The isolated systemic circuit provides for the delivery of blood to the tissues at a high pressure that is not possible in undivided hearts.
A pulmonary pressure that is too high..
Would result in pulmonary edema.
A systemic pressure that is too low…
Would result in poor delivery of blood to the tissues.
