Transcript Unit 8 Circulatory PPT

The Circulatory System
Function of the Circulatory
System
• Use blood to move materials through the
body
– Oxygen to our cells
– Glucose to our cells for energy
– Hormones
– Antibodies that fight germs
– Wastes such as Carbon Dioxide
Parts of the Circulatory System
• Divided into three major parts:
– The Blood Vessels
– The Blood
– The Heart
Blood Vessels
Hollow tubes that circulate your blood
– Arteries- Carry blood with oxygen AWAY
from the heart
– Veins-Carry blood with carbon dioxide TO the
heart
– Capillaries-very thin so oxygen, glucose, and
carbon dioxide can pass through
Have strong, muscular walls
The inner layer is very smooth so that the blood
can flow easily
http://hes.ucf.k12.pa.us/gclaypo/circdia.html
Valves are located inside the veins. The valves
only allow blood to move in one direction.
http://hes.ucf.k12.pa.us/gclaypo/circdia.html
Arteries
w3.uokhsc.edu
Capillaries
Veins
Blood
3 Types of Blood Cells:
1. Red blood cells carry nutrients, water,
oxygen and waste products to and from your
body cells. Most numerous of the
blood cells.
2. White blood cells, or leukocytes, are the
body's defense system. Largest
in size but fewest in number.
3. Platelets: Prevents bleeding. Smallest of the
blood cells.
http://hes.ucf.k12.pa.us/gclaypo/circdia.html
http://hes.ucf.k12.pa.us/gclaypo/circdia.html
The Heart
•
•
•
•
Size of your fist
Thick muscular walls
Divided into 4 chambers (rooms)
Upper chambers – “Atriums” receive blood
coming in from the veins
• Lower chamber – “Ventricles” squeeze
blood out into the arteries
Circulation
Right Atrium: Receives blood from body.
Low in Oxygen, High in CO2.
Right Ventricle: Pumps oxygen poor blood
to the lungs
Left Atrium: Receives blood from lungs.
High in Oxygen
Left Ventricle: Pumps oxygen rich blood to
all parts of the body.
www.biosbcc.net/doohan/ sample/htm/heart.htm
http://sln.fi.edu/biosci2/systems/
http://hes.ucf.k12.pa.us/gclaypo/circdia.html
The heart, the lungs, and the
blood vessels work together to
form the cycle part of the
circulatory system.
Pulmonary Circulation
Movement of blood from the
heart, to the lungs, and
back to the heart again.
Coronary Circulation
Coronary circulation refers
to the movement of blood
through the tissues of the
heart.
What is “heart rate”?
Heart rate is the number of heartbeats per
unit of time.
Also known as “pulse”.
What is Blood Pressure?
 The force of blood against the walls of
blood vessels.
 It is responsible for the movement of blood
through the arteries.
 Good blood pressure is 120/80.