Exsc 224 Final Exam Questions and Correct
Answers
chapter 18
heart
heart
dynamic living organic mechanical device
heart structure
4 chambers:
2 atria
2 ventricles
blood flow
VAVA (heart)
- vein
- atria
- ventricle
- artery
ACV (blood vessels)
- arteries
- capillaries
- veins
heart pressure
,heart uses pressure to generate the flow of blood through the pulmonary and systemic circuits
- circulatory circuits move down concentration gradient
circuits
pulmonary circuit
systemic circuit
pulmonary circuit
- low pressure (2-25mm Hg)
- delivers: oxygen poor blood to lungs
- oxygen rich blood to systemic circuit
high pressure in pulmonary circuit
pulmonary arteries
low pressure in pulmonary circuit
pulmonary veins
systemic circuit
- high pressure (2-120 mm Hg)
- delivers: oxygen rich blood to organs and tissues
- oxygen poor blood to pulmonary circuit
high pressure in systemic circuit
aorta
low pressure in systemic circuit
,vena cava
why is systemic circuit higher pressure than pulmonary circuit?
- systemic circuit pumps blood to a much greater distance through the body, against gravity
- pulmonary circuit only has to deliver blood to the lungs, which are located closer to the heart
heart valve histology
composed of dense irregular connective tissue covered by epithelium (endocardium)
endocardium of heart valve
a layer of simple squamous epithelium that covers connective tissue of the valve
heart valve function
- regulates the direction of blood flow through the heart based on pressure
- prevents back flow of blood
heart valves
right
- tricuspid valve
- pulmonary valve
left
- bicuspid (mitral) valve
- aortic valve
tricuspid valve
, right atrioventricular valve
- valve between the right atrium and the right ventricle
- three cusps
pulmonary valve
right semi lunar valve
- valve between the right ventricle and the pulmonary artery
- crescent shape
bicuspid (mitral) valve
left atrioventricular valve
- valve between the left atrium and the left ventricle
- two cusps
aortic valve
left semi lunar valve
- valve between the left ventricle and the aorta
- crescent shape
right heart blood flow pathway
systemic circuit
vena cava
right atrium
tricuspid valve
right ventricle
Answers
chapter 18
heart
heart
dynamic living organic mechanical device
heart structure
4 chambers:
2 atria
2 ventricles
blood flow
VAVA (heart)
- vein
- atria
- ventricle
- artery
ACV (blood vessels)
- arteries
- capillaries
- veins
heart pressure
,heart uses pressure to generate the flow of blood through the pulmonary and systemic circuits
- circulatory circuits move down concentration gradient
circuits
pulmonary circuit
systemic circuit
pulmonary circuit
- low pressure (2-25mm Hg)
- delivers: oxygen poor blood to lungs
- oxygen rich blood to systemic circuit
high pressure in pulmonary circuit
pulmonary arteries
low pressure in pulmonary circuit
pulmonary veins
systemic circuit
- high pressure (2-120 mm Hg)
- delivers: oxygen rich blood to organs and tissues
- oxygen poor blood to pulmonary circuit
high pressure in systemic circuit
aorta
low pressure in systemic circuit
,vena cava
why is systemic circuit higher pressure than pulmonary circuit?
- systemic circuit pumps blood to a much greater distance through the body, against gravity
- pulmonary circuit only has to deliver blood to the lungs, which are located closer to the heart
heart valve histology
composed of dense irregular connective tissue covered by epithelium (endocardium)
endocardium of heart valve
a layer of simple squamous epithelium that covers connective tissue of the valve
heart valve function
- regulates the direction of blood flow through the heart based on pressure
- prevents back flow of blood
heart valves
right
- tricuspid valve
- pulmonary valve
left
- bicuspid (mitral) valve
- aortic valve
tricuspid valve
, right atrioventricular valve
- valve between the right atrium and the right ventricle
- three cusps
pulmonary valve
right semi lunar valve
- valve between the right ventricle and the pulmonary artery
- crescent shape
bicuspid (mitral) valve
left atrioventricular valve
- valve between the left atrium and the left ventricle
- two cusps
aortic valve
left semi lunar valve
- valve between the left ventricle and the aorta
- crescent shape
right heart blood flow pathway
systemic circuit
vena cava
right atrium
tricuspid valve
right ventricle
