Circulatory System

1
Circulatory System
Transports materials throughout the body in the
blood.

• Made up of blood, the heart and blood vessels.

Red Blood Cells
2
Blood
Connective tissue made up of

• Plasma
• fluid part of the blood (water, minerals,
  sugars, proteins)
• Red blood cells
• Supply your cells with oxygen. Made in bone
  marrow. Hemoglobin Oxygen carrying protein
• White blood cells
• Help you stay healthy by destroying germs and
  clean wounds.
• Platelets - help form blood clots in a damaged
  area.

3
April 24th

• Write down your homework
• Study flashcards for Skeletal and Muscular Quiz
  Tuesday!
• Get out your flashcards to be checked. Spread
  them out on your desk!
• Get out your packet.

Happy Birthday, Erika Ellithorpe!
4
Heart
Heart pumps oxygen-poor blood to the lungs and
oxygen-rich blood to the body.
The heart is made up of A left and right
side Atrium (an upper chamber) Ventricle (a
lower chamber) Valves prevent blood from going
backwards. Separate atrium and ventricles.
5
Blood Vessels
A blood vessels is a hollow tube that transports
blood.
There are three type of blood vessels

• Arteries - direct blood away from the heart.
• Veins - direct the blood back to the heart.
• Capillaries
• Smallest blood vessel, one cell thick.
• Substances can easily diffuse through capillary
  walls.

6
Circulation of Blood
Pulmonary Circulation
The flow of blood between the heart and the lungs.
Systemic Circulation
The flow of blood between the heart and the body.
The pulmonary and systemic circulations work
together to transport materials between the
lungs, heart and body.
7
4. Oxygen-rich blood returns to the left atrium
of the heart in the pulmonary vein.
1. Oxygen-poor blood from the body returns to the
right atrium of the heart in the vena cava.
5. Oxygen-rich blood is pumped from the left
atrium to the left ventricle through a valve.
2. Oxygen-poor blood is pumped from the right
atrium to the right ventricle through a valve.
6. Oxygen-rich blood is pumped from the left
ventricle to the body in the aorta.
3. Oxygen-poor blood is pumped to the lungs in
the pulmonary artery. Inside the lungs the blood
picks up oxygen.
8
Your Heart
Pulmonary Veins
Aorta
Vena Cava
Left Atrium
Right Atrium
Valve
Valve
Right Ventricle
Left Ventricle
Pulmonary Artery
9
right atrium
right ventricle
left ventricle
left atrium
Left lung
Right lung
Lower body
Upper body