Quiz 1 Part 3 Flashcards
Blood flows from the right atrium into what?
The right ventricle through the right atrioventricular (tricuspid) valve
Blood also flows from the left atrium into what?
The left ventricle through the left atrioventricular (bicuspid, mitral) valve.
Blood vessels draining into or leaving the right side of the heart carry what?
De-oxygenated (oxygen-poor) blood.
What does the pulmonary valve control?
The opening from the
right ventricle into the pulmonary trunk
What does the aortic valve control?
The opening from the left ventricle into the aorta.
The valves are just what?
Soft flaps of connective tissue and do not open or close by any muscular effort of their own.
Blood vessels draining into or
leaving the left side of the heart carry what?
Oxygenated (oxygen-rich) blood.
What three layers of tunics do the walls of arteries and veins consist of?
Tunica Interna
Tunica Media
Tunica Externa
What is the tunica interna?
The innermost layer and is exposed to the
blood. It consists of a simple squamous epithelium
What is the tunica media?
Is the middle layer. It is usually the thickest layer and consists of smooth muscle, collagen fibers, and elastic tissue
What is the tunica externa?
It is the outermost layer. It is composed of loose connective tissue
What does the right side of the heart supply?
The pulmonary circuit.
What does the left side of the heart supply?
The systemic heart
What does the left ventricle bear?
The greatest workload of all four chambers because it has to pump blood throughout the entire body
The atria only pump blood into what?
The ventricles immediately below
