BIOLOGY - UNIT 8: HUMAN ANATOMY AND PHYSIOLOGY THE HEART
filariasis
A disease caused by roundworms blocking lymphatic channels
electrocardiogram
A graph detecting the electrical changes in the heart as it beats
arterioles and capillaries
Arteries branch into smaller vessels called _____.
pulmonary arteries
Blood flowing to the lungs from the heart flows through the .
hypertension
Blood pressure that is too high
artery
Blood vessel leaving the heart
veins
Blood vessels returning to the heart
veins, superior vena cava and pulmonary veins
Blood vessels which carry blood to the heart are:
atrioventricular node
Conducts the signal from the sinoatrial node to the rest of the heart
myocardial infarction
Death of heart muscle due to absent blood supply
buboes
Greatly enlarged lymph nodes as a result of infection
(1) lack of regular exercise, (2) the food we eat, and (3) the ill effects of cigarette smoking.
Heart attacks are a major cause of death in the United States. A few of the reasons are:
clogged coronary arteries
Heart attacks are associated with:
systolic - heart pumping, and diastolic - heart relaxed
How is blood pressure measured?
elephantiasis
Massive elephant-like swelling of the lower parts of the body due to filariasis, a tropical infectious disease
atrium
One of the two thin-walled chambers that receive blood into the heart from the veins
coronary
Refers to the arteries that supply blood to the heart
arteriole
Small artery
venule
Small vein
Purkinji fibres
Specialized electrical conducting fibres in the heart
right atrium.
Superior and inferior vena cava carry oxygen poor blood to the _________
edema
Swelling of part of the body due to accumulated interstitial fluid
systemic
That part of the circulation that supplies all the body except the lungs
120/80
The average blood pressure for a healthy adult is around
seventy beats per minute
The average heart rate of an adult is about ____________
bubonic plague
The black death, a recurrent epidemic disease during the Middle Ages
systole
The contraction of the ventricles, which pumps blood into the aorta and pulmonary arteries.
to prevent blood from flowing backward
The function of the various heart valves is:
myocardium
The heart muscle
thoracic duct
The large lymphatic vessel that collects lymph from the lower half of the body and dumps it into the blood circulation
interstitial fluid
The liquid that surrounds the cells in the body, lymph
vagus nerve
The major autonomic nerve controlling the body's automatic functions
bicuspid valve
The mitral valve
sinoatrial node
The normal pacemaker of the heart
do not
The pulmonary arteries _______ carry oxygenated blood.
diastole
The relaxation and dilation of the heart chambers that allows them to fill with blood
pericardium
The sac around the heart.
ventricle
The two thick, muscular cavities in the heart which pump the blood.
mitral valve
The valve between the left atrium and the left ventricle
aortic valve
The valve between the left ventricle and the aorta
tricuspid valve
The valve between the right atrium and the right ventricle
pulmonary valve
The valve between the right ventricle and the pulmonary artery
endocardium
Thick, fibrous inner layer of the heart
epicardium
Thin filmy tissue surrounding the heart
capillary
Tiny blood vessels between arterioles and venules
filter and purify interstitial fluids returning to the blood
What is the function of the lymph nodes?
the arteries carrying blood to the body, and the aorta
Which arteries carry oxygenated blood?
all veins entering the left atrium, left pulmonary veins, and right pulmonary veins
Which veins carry oxygenated blood?
they must withstand systolic pressure
Why do arteries require thicker walls than veins?
mitral
between the left atrium and the left ventricle
aortic
between the left ventricle and the aorta
tricuspid
between the right atrium and the right ventricle
pulmonary
between the right ventricle and the lungs
140/90
is considered too high for the average blood pressure for a healthy adult
lymph
lymphatic, Interstitial fluid that is transported in lymphatic vessels
