Transcript Circulatory System NOTES

The Circulatory System
Structure, Function, and Information Processing Unit:
MS.LS 1-3 ~ Use argument supported by evidence for how the body is a system of interacting
subsystems composed of group of cells.
Greek word:
CARDIO means heart
VASCULAR means vessel
Location of Heart
I. Function of Circulatory or
Cardiovascular System
A. Circulatory System – Keeps the body
working by delivering oxygen to body cells
and removing waste (CO2) from the cells.
Delivering
Removing
Questions
1. What is the main job of the
Cardiovascular System?
Questions
1. What are the one main job of the
Cardiovascular System?
a. Transport nutrients and oxygen
ll. Sub-systems and the components that work
together to support this system:
A. Blood – connective tissue made of cells, cell parts and
plasma. Blood is made up of about 45% solids (cells)
and 55% fluids (plasma).
i. Parts of the Blood
1. Red Blood Cells – Made
in bone marrow; carries
oxygen, food, and rids
body of CO2 and waste
2. White Blood Cells – Help
fight disease and infection by
destroying bacteria and
germs that enter the body.
Made in the lymph nodes
Parts of the Blood
3. Platelets – Help blood
to clot, to prevent excess
bleeding.
4. Plasma – Water
portion of the blood; 55%
of blood is plasma
ii. Four Types of Blood
•
•
•
•
•
Type A:
42% Accepts A and O
Type B:
10% Accepts B and O
Type AB:
3%
Accepts AB and O
Type O:
45% Universal Donor
RH Factor = is the + and – of the blood
Questions
1. What is blood?
2. What are the four parts of the blood AND
tell what each part does.
a.
b.
c.
d.
Questions
1. What is blood? connective tissue made of cells, cell
parts and plasma. Blood is made up of about 45%
solids (cells) and 55% fluids (plasma).
2. What are the four parts of the blood AND tell
what each part does.
a. Red blood cells – carry oxygen
b. White blood cells – fight disease
c. Platelets – help blood clot
d. plasma- liquid part of blood
Parts of the Circulatory System
B. The Heart - is divided into FOUR
Chambers
1. Two Types of Arteries
• Arteries start with A takes
blood away !!
• Aorta – Largest blood
vessel in the heart
• Pulmonary Artery –
Carries blood containing
carbon dioxide from your
heart to your lungs
• Pulse - each time the
heart beats, blood is
pumped out of the heart
with pressure.
2.Three Types of Veins
• Veins start with V
brings blood back to
me
– 1. Inferior Vena Cava –
Where the blood enters the
heart from the body.
– 2. Superior Vena Cava –
Where the blood enters the
heart from the body.
– 3. Pulmonary Vein – Carries
blood-containing oxygen
from your lungs to your
heart.
3. Capillaries
a. Connect arteries and veins
b. Smallest blood vessels in our body
c. Blood cells pass through capillaries in single file
d. Allows nutrients, oxygen and other substances
through the capillary walls.
4. Blood Pressure – the force exerted by the blood on the
walls of a blood vessel.
The Four Valves of the Heart
• Tricuspid Valve – Lets
the blood fill in the right
atrium before it enters
the right ventricle.
• Bicuspid Valve – Lets
the blood fill in the left
atrium before it enters
the left ventricle
The Four Valves of the Heart
• Right Semi lunar ValveLets the right ventricle fill
before releasing the blood
into the pulmonary artery.
• Left Semi lunar Valve –
Lets the blood fill in the left
ventricle before sending it
to the aorta
• Septum – Divides the
heart in half
The American Heart Association reports
that a normal heart will beat 100,000
times a day. About 2,000 pints of blood is
pumped through the body on each day.
The average human heart will beat about
2 billion times throughout the life of a 70year-old person.
2. Viens
1.
Arteries
Three Kinds of Blood Vessels
• Arteries – Carries blood away from the
heart
• Veins – Carries blood back to the heart
• Capillaries – Delivers low-oxygen blood to
veins (Smallest)
Questions