circulatory system Flashcards
it functions with other body systems to deliver different materials in the body
circulatory system
A life support structure that nourishes cells.
circulatory system
body fluid in the circulatory system of humans and other vertebrates. It carries the materials through out the body (nutrients & oxygen)
blood
Transports gases, wastes, nutrients, hormones
blood
Prevents blood loss during injury
blood
Defense against pathogens and toxins
blood
Regulating body temperature
blood
also known as erythrocytes
red blood cells
also known as leukocytes
white blood cells
carries O2 from the lungs to the body tissues and CO2 (waste) away from the tissues and back to the lungs.
red blood cells
are responsible for protecting your body from infection
white blood cells
________ circulate in your blood and respond to injury or illness.
white blood cells
also known as thrombocytes
platelets
are small, colorless cell fragments in our blood that forms clots and stop or prevent bleeding
platelets
is the liquid component of you blood that contributes 55% of your blood’s total volume and is necessary to help your body recover from injury, distribute nutrients, remove waste and prevent infection
plasma
Contains Oxygen & Nutrients
Bright red
Found in arteries
H/L to body
oxygenated blood
Contains Carbon dioxide & Waste
Dark red
Found in veins
Body to H/L
deoxygenated blood
delivers blood to the organs and tissues in your body.
blood vessels
carry blood from the rest of the body back towards the heart
veins
carry deoxygenated (oxygen-poor) blood and return it to your heart, excluding pulmonary veins, which carry oxygenated blood from the lungs to the heart
veins
work together with other blood vessels and your heart to keep your blood moving
veins
carry blood away from the heart towards the rest of the body
arteries
carry oxygenated (oxygen-rich) blood from your heart to all of your body’s cells except pulmonary arteries, which carry deoxygenated blood to the lungs for oxygenation.
arteries
play a crucial role in distributing oxygen, nutrients and hormones throughout your body
arteries
are the smallest blood vessels that move blood to and from the cells of the body
capillaries
are so small that blood cells must move through them in single file
capillaries
walls are very thin that materials can easily diffuse into and out of them
capillaries
carry oxygen-rich blood away from your heart.
arteries
are tiny, thin blood vessels that connect veins and arteries.
capillaries
carry oxygen-poor blood from your body’s tissues back to your heart.
veins
how bis is your heart?
as big as your fist
pups blood throughout the body
heart
supplies oxygen and nutrients to tissues and removes carbon dioxide and wastes from the blood
heart
helps maintain adequate blood pressure throughout the body and controls heart rate
heart
receives incoming blood
upper chamber - atria
pump the blood out of the heart
lower chamber - ventricle
receives oxygen-poor blood from the body and pumps it to the right ventricle.
right atrium
pumps the oxygen-poor blood to the lungs.
right ventricle
receives oxygen-rich blood from the lungs and pumps it to the left ventricle.
left atrium
pumps the oxygen-rich blood to the body.
left ventricle
prevents the backward flow of blood
valves
has three leaflets
pulmonary valve
separates the right ventricle from the pulmonary artery
pulmonary valve
Opens to allow blood to be pumped from the right ventricle to the lungs (through the pulmonary artery) where it will receive oxygen.
pulmonary valve
Prevents the back flow of blood from the pulmonary artery to the right ventricle.
pulmonary valve
has three leaflets or cusps
tricuspid
Separates the top right chamber (right atrium) from the bottom right chamber (right ventricle).
tricuspid valve
Opens to allow blood to flow from the right atrium to the right ventricle.
tricuspid valve
Prevents the back flow of blood from the right ventricle to the right atrium.
tricuspid valve
Has three leaflets, unless it’s abnormal from birth.
aortic valve
Opens to allow blood to leave the heart from the left ventricle through the aorta and the body.
aortic valve
Has two leaflets.
Mitral valve
Separates the left ventricle from the aorta.
aortic valve
Separates the top left chamber (left atrium) from the bottom left chamber (left ventricle).
Mitral valve
Prevents the backflow of blood from the aorta to the left ventricle.
aortic valve
Opens to allow blood to flow from the left atrium to the left ventricle.
Mitral valve
T OR F
The valve is improperly formed and stiff.
false, properly formed and flexible
large artery that carries blood throughout your body
Aortic valve
Prevents the back flow of blood from the left ventricle to the left atrium.
Mitral valve
connects your left ventricle and aorta
Aortic valve
T OR F
The valve should close tightly so no blood leaks backwards into the chamber.
true
T OR F
The valve should open all the way so the blood can pass through.
true
connects your right ventricle and pulmonary arteries
Pulmonary valve
arteries that carry blood to your lungs
Pulmonary valve
connects your left atrium and left ventricle.
Mitral valve
connects your right atrium and right ventricle
Tricuspid valve
the blood vessels in the circulatory system where the exchange of gas takes place
capillaries
What keeps blood from flowing backwards in the heart?
valves
What is the function of the heart?
to pump blood around the body
The human heart is an organ that pumps blood throughout the body supplying oxygen, nutrients, blood, and hormones to and from the tissues removing _______ and the other wastes
carbon dioxide
Which of the following is not a blood vessel?
A. arteries
B. lymph vessels
C. veins
D. capillaries
b. lymph vessels
