Transcript Circulatory System Powerpoint presentation

Circulatory System
Human Transport
• The circulatory system picks up materials and
distributes the materials throughout an
organism.
• Most circulatory systems (multicellular
organisms) consist of a heart, blood and
blood vessels.
Multicellular vs. Unicellular
• A) Unicellular Organisms- Do not have a
circulatory system.
• Ex: Amebas, Parameciums,
sponges.
These organisms use the process of
DIFFUSION to achieve transport
Multicellular Organisms
• These organisms have a circulatory system.
Ex: Humans, Earthworms, Insects
There are two types:
Open Circulatory System: Blood does not flow
in vessels (Ex: insects)
Closed Circulatory System: Blood flows in
vessels (Ex: Earthworms, Humans)
Blood Vessels in Humans
• There are three types of vessels in humans
• Arteries, Veins and Capillaries
• Arteries- Carry oxygenated blood AWAY from
the heart (A-away)
• Veins- Carry deoxygenated blood TOWARD
the heart
• Capillaries- Connect arteries to veins
Blood Vessels
Artery Facts
• Arteries have the thickest walls
• Blood Pressure is measured here
•
•
•
•
The blood pressure reading is:
Systolic/Diastolic Ex: 120/70
(pumping/at rest)
The bottom number should never
exceed the top.
VEINS
• Veins carry deoxygenated blood
back toward the heart.
•
•
•
•
Vein Facts:
Thinner and flatter than arteries
Blood pressure is lower in veins
They have valves which prevent
backward flow of blood.
Capillaries
• Connect arteries to veins
• Allows for DIFFUSION of
oxygenated and
deoxygenated blood.
Capillary Facts:
• Smallest/Microscopic vessel
• Without these blood could
not be exchanged
Facts about BLOOD
• It is a tissue
• We can hold 5 liters
• It fights disease
• It Delivers:
• Digested Nutrients
• Oxygen/Carbon Dioxide
• Water, Minerals and Vitamins
Components of Blood
Components of Blood
•
•
•
•
• Red Blood Cells (RBC)
There are roughly 5,000,000 in
one drop of blood.
It carries and important protein
called hemoglobin.
Hemoglobin carries oxygen
RBC’s major job is to transport
oxygen
White Blood Cells
• There are about 8,000 in one
drop
• There are five different types
• They protect the body from
disease and they produce
antibodies
Platelets
• They clot blood
• There are about
250,000 in a drop
• They use enzymes
to help clot the
blood
Plasma
• 90% water and 10%
nutrients
• Made up of salt,
water, vitamins
• It is the non living
portion of the
blood
Blood Diseases
• Sickle Cell Anemia
– Affects RBC’s
– Distorts the shape
(crescent moons)
– Missing hemoglobin
which transports
oxygen.
• Hemophilia– Missing platelets
– Can’t Clot Blood
– Enzyme reactions do not
occur
Leukemia
Overproduction of abnormal
WBC’s
BLOOD TYPES
• There are 4 blood types
• A, B, AB, O
• Who can give:
• A-
A, AB
• B-
B, AB
• AB- only AB (Universal Reciepient)
• O- To all (Universal Donor)
THE HEART
• The human heart has 4 chambers
• The Left side= oxygenated blood
• The right Side= deoxygenated blood
• COLLECTING CHAMBERS
Left Atrium, Right Atrium
• PUMPING CHAMBERS
Left Ventricle, Right Ventricle
Types of blood flow
• 1) Systemic Circulation- Blood flow between
the heart and body
• 2) Pulmonary Circulation- Flow Between the
heart and lungs.
Box Diagram