The Heart
Which veins carry oxygenated blood?
- all veins entering the left atrium - left pulmonary veins - right pulmonary veins
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 vessels which carry blood to the heart are:
- veins - superior vena cava - pulmonary veins
Match the valves with their position.
1. between the left ventricle and the aorta - aortic 2. between the left atrium and the left ventricle - mitral 3. between the right atrium and the right ventricle - tricuspid 4. between the right ventricle and the lung - pulmonary
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
Arteries branch into smaller vessels called ______ and _____.
arterioles, 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
capillaries
The exchange of O2 and CO2 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
The cardiac test which records an impulse pattern is called a(n)
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
The sac around the heart
pericardium
Blood flowing to the lungs from the heart flows through the
pulmonary arteries
A group of cardiac cells located in the right atrium, produce an electrical _______ and are collectively called the ________.
signal, pacemaker
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
The contraction of the ventricles, which pumps blood through the aorta and pulmonary arteries
systole
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
The thick, muscular cavities in the heart which pump the blood
ventricle