The Heart
Which of these is a healthy blood pressure:
120/80
All veins carry dark CO2 rich blood.
False
The pulmonary arteries carry oxygenated blood.
False
A bubo is a lymph node enlarged as a result of infection.
True
The condition of edema describes:
accumulation of excess liquid in tissues
Which veins carry oxygenated blood?
all veins entering the left atrium left pulmonary veins right pulmonary veins
between the left ventricle and the aorta
aortic
Arteries branch into smaller vessels called _____.
arterioles and capillaries
The two heart chambers which receive arriving blood are
atria
Conducts the signal from the atria node to the ventricles
atrio-ventricular node
One of the two thin-walled chambers that receive blood into the heart from the veins
atrium
Microscopic veins and arteries are called
capillaries
The exchange of oxygen and carbon dioxide at the cellular level occurs through the
capillaries
Heart attacks are associated with:
clogged coronary arteries
The relaxation and dilation of the heart chambers during which they are filled with blood
diastole
The condition of elephantiasis is a form of:
edema
A graph detecting the electrical changes in the heart as it beats
electrocardiogram
What is the pericardium?
enclosure around the heart
What is the function of the lymph nodes?
filter and purify interstitial fluids returning to the blood
between the left atrium and the left ventricle
mitral
between the right ventricle and the lungs
pulmonary
A small mass of cardiac muscle that generates a normal heart beat
sino-atrial node
The electrical signals that activate the heart begin in the _________ and are transmitted to the ventricles through the ___________
sino-atrial node , atrio-ventricular node
A group of cardiac cells located in the right atrium, produce an electrical signal and are collectively called the
sino-atrial node.
The contraction of the ventricles, which pumps blood through the aorta and pulmonary arteries
systole
How is blood pressure measured?
systolic - heart pumping diastolic - heart relaxed
Which arteries carry oxygenated blood?
the arteries carrying blood to the body the aorta
Blood flowing to the lungs from the heart flows through
the pulmonary arteries
Why do arteries require thicker walls than veins?
they must withstand systolic pressure
The function of the various heart valves is:
to prevent blood from flowing backward
between the right atrium and the right ventricle
tricuspid
Blood vessels which carry blood to the heart are:
veins super vena cava pulmonary veins
The thick, muscular cavities in the heart which pump the blood
ventricle
