BIOD 152 Module 4 Questions and
Correct Answers
Why is the cardiovascular system a closed circulatory system?
✓✓~ the fluid contents are pumped from the heart throughout the body and back to the heart
What are some functions of the cardiovascular system?
✓✓~ -Transportation of gases, nutrients waste
-prevents loss of blood from ruptured vessels
-helps fight off pathogens
What does the study of the cardiovascular system cover?
✓✓~ -muscular heart
-blood vessels
-blood
Where is the heart located?
✓✓~ Pericardial cavity within anterior portion of the mediastinum
What separates the thoracic cavity into 2 pleural cavities?
✓✓~ mediastinum
,Layers of the heart
✓✓~ -pericardium: double layered, surrounded by fluid
-myocardium: thickest layer
-endocardium: continuous with blood vessels
What anchors the heart to the diaphragm?
✓✓~ pericardium
Which layer of the heart wall is the contractile layer
✓✓~ Myocardium
4 chambers of the heart
✓✓~ -right & left atrium: receiving chamber, smaller
-right & left ventricle: sending chamber, larger
What separates the 4 chambers into a right and left?
✓✓~ Septum
What part of the heart is only present in fetuses?
✓✓~ Fossa Ovalis:
-opening btwn atria
-allows blood to move directly btwn atria, bypassing the lungs
, What is the purpose of having valves in the heart?
✓✓~ To regulate the direction of blood flow
Which valve sends blood out of the RV and into the pulmonary trunk?
✓✓~ Pulmonary valve
Which valve sends blood out of the LV into the aorta?
✓✓~ Aortic valve
Why does the aortic valve need to be stronger?
✓✓~ Because blood flow leaving the LV has a stronger presser
Which valve sends blood out of the RA and into the RV?
✓✓~ Tricuspid valve
Which valve sends blood from the LA into the LV?
✓✓~ Mitral valve (bicuspid)
blood pathway through heart valves
✓✓~ -RA through tricuspid valve
-RV through pulmonary valve
-pulmonary trunk to pulmonary arteries to lungs
Correct Answers
Why is the cardiovascular system a closed circulatory system?
✓✓~ the fluid contents are pumped from the heart throughout the body and back to the heart
What are some functions of the cardiovascular system?
✓✓~ -Transportation of gases, nutrients waste
-prevents loss of blood from ruptured vessels
-helps fight off pathogens
What does the study of the cardiovascular system cover?
✓✓~ -muscular heart
-blood vessels
-blood
Where is the heart located?
✓✓~ Pericardial cavity within anterior portion of the mediastinum
What separates the thoracic cavity into 2 pleural cavities?
✓✓~ mediastinum
,Layers of the heart
✓✓~ -pericardium: double layered, surrounded by fluid
-myocardium: thickest layer
-endocardium: continuous with blood vessels
What anchors the heart to the diaphragm?
✓✓~ pericardium
Which layer of the heart wall is the contractile layer
✓✓~ Myocardium
4 chambers of the heart
✓✓~ -right & left atrium: receiving chamber, smaller
-right & left ventricle: sending chamber, larger
What separates the 4 chambers into a right and left?
✓✓~ Septum
What part of the heart is only present in fetuses?
✓✓~ Fossa Ovalis:
-opening btwn atria
-allows blood to move directly btwn atria, bypassing the lungs
, What is the purpose of having valves in the heart?
✓✓~ To regulate the direction of blood flow
Which valve sends blood out of the RV and into the pulmonary trunk?
✓✓~ Pulmonary valve
Which valve sends blood out of the LV into the aorta?
✓✓~ Aortic valve
Why does the aortic valve need to be stronger?
✓✓~ Because blood flow leaving the LV has a stronger presser
Which valve sends blood out of the RA and into the RV?
✓✓~ Tricuspid valve
Which valve sends blood from the LA into the LV?
✓✓~ Mitral valve (bicuspid)
blood pathway through heart valves
✓✓~ -RA through tricuspid valve
-RV through pulmonary valve
-pulmonary trunk to pulmonary arteries to lungs
