Biology Circulatory System (slide 12) Flashcards
What is “the circulatory system”?
the system of organs that assits the body in pumping blood to the body
Why is the circulatory system important?
-It aids the body in pumping the blood
on average it beats 72 beats/minute
pumps 5 liters of blood
The circulatory system is made up of one major organ and a network of blood
vessels
THE HEART
why do we want the heart and lungs close to each other
easier to exchange gases
Purpose:
pumps blood
Blood coming into the heart through the
superior and inferior vena cava
Once the right atrium is filled with enough blood
the right atrium is going to contract and squeeze the blood through a small valve
After the small valve it will got to (right atrium)
the RIGHT VENTRICLE
it will fill up with blood, expand, compress, and will push the blood to the pulmonary artery
if the blood is from the digestive system it is deoxygenated
the pulmonary artery will bring the blood to the lungs for gas exchange to make it oxygenated blood
After the blood is oxygenated
goes comes back through the pumansey veins
and goes to the Left Artrium
After the left Atrium it gets pumped to the left ventricle
and then it goes to the AORTS (BIGGEST/MAIN artery)
The left ventricle needs
a lot of power because it transport oxygenated blood to the entire body
Why do we have a two vena cavas?
efficiency to help the blood travel from the lower part of the body and the top part of our body.
Arteries
carry blood AWAY from the heart
“A”for away
high blood pressure
carry mostly oxgenated blood
Veins
Carry blood to the heart
-veIN for “in”
-LOW PRESSURE
they mostly carry deoxygenated blood
Capillaries
sight of diffusion & osmosis
Capillaries ARTERY+VEIN
Artery mostly have oxygenated blood and veins mostly have deoxygenated blood. Capillaries do gas exchange and
Red Blood Cell
Purpose:
transport gases
white blood cells
protection & defence from foreign invaders.
Platelets
Clot blood -If you cut your finger, they help to clot the blood
Blood Plasma
mostly water, helps to dissolve, helps to carry minerals and GLUCOSE.
55% of our blood is
plasma
-mostly water
45% of our blood are
Red blood cells
less than 1% of our blood is
White blood cells
The circulatory system carries
the glucose and oxygen needed for cellular
respiration
The circulatory system carries
the waste products of cellular respiration
STSE – Medicine and Health-Atherosclerosis
Buildup of plaque in the arteries can slow or stop blood flow
If we are eating a lot of bad fats and cholesterol
The role of the circulatory system
-exercise
helps the heart easily pump blood fast and easily
The main structures of the circulatory system are: the heart and blood vessels.
a. List the four (4) chambers of the heart.
b. List the two types of blood vessels.
c. Which blood vessels carry oxygenated blood away from the heart? Which vessels carry
to the heart deoxygenated blood?
Four chambers: right atrium, right ventricle, left atrium, left ventricle
Arteries (carry oxygenated blood away from the heart) and Veins (carry deoxygenated blood to the
heart)
- List the path blood travels when entering the heart and exiting to the rest of the body (note the
type of blood in each chamber of the heart).
right atrium (deoxygenated), right ventricle (deoxygenated), left atrium (oxygenated), left ventricle
(oxygenated)
Why is the heart important to cellular respiration?
The heart and blood transports the nutrients needed for cellular respiration.
Using your understanding of the circulatory system, explain why blood pressure develops in an
individual. How can it be changed?
Blood pressure develops from the heart pumping blood throughout the body and the resistance from
the arteries.
It can be changed by many factors including sodium intake, exercise, and stress.
Sickle-cell anemia is a disorder that affects the shape of red blood cells (it makes it more
difficult for oxygen to be picked up by red blood cells). Explain how this will impact someone’s
ability to participate in a marathon.
If the cell is deformed it will be unable to carry oxygen properly around the body which will reduce the
ability for a person to run a marathon.
