Download SBI3C: The Circulatory System

SBI3C:
The Circulatory System:
Name _____________
The body’s transport system:
Functions:
1. ______________________:
•
___________ and ___________ etc are distributed to body cells.
•
__________ ____________ and _________ are taken away from the cell.
2. Maintenance of body temp & chemical balance.
3. Circulation of hormones, components of the immune system etc.
Structures:
1. ______________ which carries materials to be transported (____________)
2. ______________ _________________ or tubes for the blood to move through
(_________________, ___________, ______________________)
3. A _______________ that pushes the fluid through the blood vessels (_________)
1. Blood Vessels
____________ ; __________
Arteries:
- carry blood _________________from the heart
- ____________and elastic walls (high pressure)
- usually high O2, low CO2 (except ____________ arteries)
Veins:
- carry blood ______ the heart
- ___________ and slightly elastic walls
- contain flap-like ___________ to prevent backflow
- usually low O2, high CO2 (except ________________ veins)
Capillaries:
- tiny blood vessels ________________ cell thick
- microscopic ___________________ of blood vessels at all tissues
- allows ________________ of materials between cells & blood
2. The Incredible Heart Muscle/Pump
Great ______________:
– __________ 4-5 L of blood through ~160 000 km of blood ____________.
High _______________:
– __________ on average 72 beats / minute, ~ 100 000 beats / day
– During a lifetime, could fill an ocean tanker full of blood TWICE
Size:
– Size of your ___________ & weighs ~ 300 grams
Pace Maker:
– Makes its own ‘_____________!’
– ________________ the beating of heart cells
Right Side Pump:
– Pumps blood that is _______ in ________ to the lungs to pick up oxygen.
– Deoxygenated blood from the body drains into the right __________ via the
________ __________ (large veins.)
– Blood goes from the right ___________to the right ____________ which
pumps the blood to the lungs via the pulmonary artery.
Left Side Pump:
– Pumps blood that is ________ in oxygen to the body to give oxygen to body
cells (for cell ________________)
– Oxygenated blood from the lung enters the left _____________via the
pulmonary veins.
– Blood goes from the left atrium to the left ______________ which pumps
the blood to the body via the _____________ (largest artery in the body)
On the diagram below use coloured pencil to indicate the flow oxygen poor blood
(blue) & oxygen rich blood (red). Indicate the side of the pump.
__________________ side
_____________________ side
3. Blood
Major blood component:
• ________________ (55%):
– __________________ part of blood
–
contains dissolved material
• _____________ Blood Cells (RBC - 44%):
– Contains haemoglobin that carries __________________
• White Blood Cells (WBC – 1%):
– ________________ system (WBC engulf invaders/ produce antibodies)
• Platelets (< 1%):
Cell fragments needed to ___________ blood
Branches of the Circulatory System
1. __________ circuit:
Blood goes from the heart to the rest of the body and back to the heart.
Includes:
a. Cardiac circuit: Blood goes to the _____________ muscle(__________arteries & veins)
b. Hepatic-Portal: Transports blood from digestive tract to __________ then to heart
c. Renal: Carries blood to, and from the ___________________
2. Pulmonary circuit:
Blood goes from the right side of the heart to the lungs & back to left side of the heart
(______________________ arteries & veins)
Heart Cycle:
• Systole: Heart _____________________
– Ventricles ___________________
– Blood is pumped _________ of the heart
• Diastole: Heart _______________ with blood
– The heart muscles _____________
– Atria ___________blood & drains it into ventricles
Heart Sounds: Lubb – Dubb - Closing of the heart valves
– Ventricles contract & increase in pressure causes the _________ valve to close shut
 Lubb sound
(Systole: Heart __________________)
– Ventricles relax, causing blood to rush in from Atria
–
Decrease in pressure as blood flows in, causing ____________ valves to shut
 Dubb sound (Diastole: Heart ________ with blood)