Transcript TEEN HEALTH COURSE 2

Chapter 3 Lesson Three Page 71
The
Circulatory
System
Your Heart and Blood Vessels
The circulatory system includes the heart, the blood
vessels and the blood itself.
circulatory system The group of organs and tissues that act as
transfer stations carrying needed materials to
cells and removing their waste products
Your Heart and Blood Vessels
The heart pumps blood around the body through a
network of arteries, veins, and capillaries.
arteries Blood vessels that carry blood away from the heart to
various parts of the body
veins Blood vessels that carry blood from all parts of the body
back to the heart
capillaries Tiny blood vessels that carry blood to and from almost
all body cells and connect arteries and veins
ARTERIES AND VEINS
CAPILLARIES
The Process of Circulation
The process of circulation involves pulmonary
circulation and systemic circulation.
pulmonary circulation When blood travels from the heart, through
the lungs, and back to the heart
systemic circulation When oxygen-rich blood travels to all body
tissues except the lungs
Blood Pressure
A certain amount of blood pressure is needed to
make blood circulate.
blood pressure The force of blood pushing against the walls
of the blood vessels
Blood Pressure
A blood pressure reading
measures two numbers.
The first is systolic pressure
and the second is diastolic
pressure.
What Makes Up Your Blood?
Blood is made up of plasma, red blood cells, white
blood cells, and platelets.
plasma The yellowish, watery part of blood
Plasma makes up over half the volume of blood.
Red and White Blood Cells
Red Blood Cells
White Blood Cells
Platelets and Plasma
Blood Types
Red blood cells are one of four types: A, B, AB, or O.
Most people’s blood contains a substance called an
Rh factor, a type of protein.
Blood Types and Compatibility
Type
O
Type
Type
A
B
Type
AB
Caring for Your Circulatory System
Tips for Caring for Your Circulatory System
Make aerobic activity a habit.
Follow a balanced food plan that is low in fats.
Develop strategies for managing stress.
Avoid using tobacco.