On National Teacher Day, meet the 2024-25 Kenan Fellows
Unit b section - 3.3 circulatory system
1.
2. This system is responsible for delivering
nutrients absorbed by the digestive system to
each cell in your body.
It is your bodies transportation network.
It also is responsible for delivering the
oxygen and wastes created by the respiratory
system.
3. Your circulatory system acts similar to the a
highway interchange;
◦ Your body has different routes to take to reach
different areas
◦ Oxygen-rich blood flows one way, CO2 rich blood
travels the other
◦ There are larger systems closer to the main area
than the remote areas of the body
4.
5. The most important part of the system
The heart is A PUMP, did you know it is
actually two pumps?
The right and left side are each a separate
pump that work together
6.
7. The right side of the heart pumps blood to
your lungs
◦ Here it receives fresh oxygen and gives CO2
The left side of your heart receives this
oxygen-rich blood from your lungs and
pumps it to all the rest of your body
The blood returns to the right side to begin
all over again
8.
9. There 2 atriums and 2 ventricles in the heart
Atriums
Receive blood from veins
◦ Right Atrium – receives blood low in oxygen from
the body and pumps it into the right ventricle
◦ Left Atrium – Receives oxygen-rich blood from the
lungs and pumps it into the left ventricle
10. Ventricles
Are the bottom two chambers of the heart
that receive blood from the atriums
Pushes blood out through arteries
◦ Right Ventricle – when it contracts it pumps blood
to the lungs
◦ Left Ventricle – When it contracts it pumps blood to
the body
11.
12. The aorta is a three hole artery that carries
the blood from the heart to the entire body
This is the major tube that carries all of the
bodies blood to the areas that need it
13.
14.
15. Made up of 3 of the 4 types of tissue;
◦ Connective on the outside (Tough)
◦ Muscle in the middle (Very strong and elastic)
◦ Epithelial on the inside
16. Inside the body there is an intricate network
of blood vessels
These vessels are about 100,000km in length
if completely stretched out
17.
18. Inside the body the blood vessels that are
responsible for carrying blood away from the
heart.
These blood vessels are called ARTERIES.
They carry blood from the heart to both the
lungs and the rest of the body
19. Have a thick muscular layer in the middle that
expands and contracts to help push blood
along
When you feel the expansion of the arteries
this is commonly known as PULSE
20.
21. Inside the body the blood vessels that are
responsible for carrying blood towards the
heart.
These blood vessels are called Veins.
They carry blood from rest of the body and
the lungs to your heart
22. Veins are thinner than arteries, and have
valves that stop the blood from flowing
backwards
23.
24. Are tiny blood vessels whose purpose is the
diffusion of nutrients and gases
Are located between arteries and veins
They have two adaptations;
◦ 1) Epithelial tissues that are only one cell thick
◦ 2) Are very narrow so that blood cells have to pass
through single file
25. Diffusion -- transports oxygen from your
blood into your cells, and carbon dioxide
from your cells into your blood
Osmosis – Transports water in and out of the
blood cell
26.
27. Is the second largest example of connective
tissue
◦ (bones are the largest)
Blood is composed of;
◦ Red Blood Cells
◦ White Blood Cells
◦ Platelets (tiny cells)
◦ Plasma (liquid portion)
Plasma makes up 55% of blood, everything else
makes up 45%
28. High specialized in order to perform their
function
◦ Function is to carry oxygen
RBC’s do not have a nuclei, therefore have
more room for oxygen
◦ Are extremely flexible – can bend and twist through
the small capillary spaces
29.
30. Specialized cells to fight infection
Some are capable or eating bacteria at
infection sites such as cuts
31.
32. Are cells that help to stop the bleeding at
cuts
PLASMA
The liquid portion of your blood, transports
nutrients to your cells and carries
wastes, such as carbon dioxide, away
