Download 7.2 Circulatory System

Circulatory System
Write in complete sentences!
Don’t talk during the Catalyst!
HW on your desk!
Catalyst
 What
is the function of the nervous system?
 Order the following terms from smallest to
largest: organ, cell, human, body system.
 What is homeostasis?
 Give one example of your body trying to put
itself back into homeostasis. Include which
systems work on this!
Have you ever wondered…
How does the heart pump blood
throughout our body?
 Why are heart attacks deadly?

Objectives
By the end of today, all SWBAT…
 Describe the structure and function
of the circulatory system
 Explain how the circulatory system
maintains homeostasis in the
human body
Agenda
Catalyst Review
 Anatomy
 Back to
Homeostasis
 Quick questions
 YOU’RE THE
DOCTOR
 Exit Question

The anatomy of the circulatory system

Key Point #1: The circulatory system consists of the
heart, blood vessels, and blood
 Heart:
pumps blood through four chambers
The anatomy of the circulatory system

Key Point #1: The circulatory system consists of the
heart, blood vessels, and blood.
 Blood
Vessels: carry blood
 Arteries: carries oxygenated blood from heart to organs
 Capillaries: O2 diffuses into organs, CO2 diffuses out
 Veins: carries deoxygenated blood from organs to heart
The anatomy of the circulatory system

Key Point #1: The circulatory
system consists of the heart,
blood vessels, and blood.

Blood Vessels: carry blood
 Pulmonary artery: Blood from
heart  lungs
 Pulmonary vein: Oxygenated
blood from lungs  heart
Blood Flow
Vena Cava
Aorta
Big veins
Big arteries
Small arteries
Capillaries
Small veins
The anatomy of the circulatory system

Key Point #1: The circulatory system consists of the
heart, blood vessels, and blood.
 Blood: fluids and cells that
carry nutrients and gasses
 Plasma: fluid; carries
nutrients and waste
 Red blood cells (RBCs):
carry O2 and CO2
 White blood cells (WBCs):
immune system cells
 Platelets: clot blood
The function of the circulatory system

Key Point #2: The circulatory
system maintains homeostasis by
distributing nutrients to cells and
taking waste away from cells
Blood
plasma: nutrients to cells, waste
out of cells
RBCs: O2 to cells, blood plasma: carries
CO2 out of cells
All doctors have to practice…
Whiteboard time!!!
Whiteboard Practice (GP)

(It’s in your notes…)
Draw
and label the four chambers of
the heart, the aorta, and the vena cava
Whiteboard Practice (GP)


Which chamber of the heart pumps blood
to the lungs?
Which chamber of the heart pumps blood
to the body?
Whiteboard Practice (GP)


Which chamber of the heart collects
oxygenated blood?
Which chamber of the heart collects
deoxygenated blood?
Whiteboard Practice (GP)

Which blood vessel brings blood to the
lungs?
 Why

do it do this?
Which blood vessel brings blood from
the lungs to the heart?
 Why
does it do this?
Whiteboard Practice (GP)

Identify THREE of the four parts of the
blood, and describe what they each do.
Whiteboard Practice (GP)

In what two ways does the circulatory
system maintain homeostasis?
(Think: what bad stuff would happen if it
worked incorrectly?)
Whiteboard Practice (GP)

James is a carrier for sickle cell, which
decreases the amount of oxygen RBCs can
carry.
 If
James had sickle cell, how would this
disorder stop his circulatory system from
maintaining homeostasis?
(Think: why will he die? )
Whiteboard Practice (GP)

A crazy student stabbed Ms. S in the right
ventricle for giving out too much homework
last night!
 How
will this injury stop her circulatory
system from maintaining homeostasis?
(Think: why will she die?)
Whiteboard Practice (GP)

Jasmine and her boo have a child (after
college and when they are financially stable).
Unfortunately, it is born with a rare birth
defect that causes it to have too little blood
plasma. 
 How
will this injury stop the child’s
circulatory system from maintaining
homeostasis?
(Think: why will it die?)
THERE’S A PATIENT IN THE ER!!!
Can you handle it on your own?
Key Point Wrap-Up

Key Point #1: The circulatory system
consists of the heart, blood vessels, and
blood
 What

does each part do?
Key Point #2: The circulatory system
maintains homeostasis in two ways
 Blood
plasma: nutrients to cells, waste out of cells
 RBCs: O2 to cells, Blood plasma: CO2 out of cells
Exit Questions
Write in complete sentences!
Don’t talk during the Exit Question!
Describe the function of RBCs.
 Contrast veins and arteries.

2 differences – DO NOT WRITE “THE COLOR”!

Someone shot Ms. S in her left ventricle!!!
 Describe the function of the left ventricle.
 How will this injury stop her circulatory
system from maintaining homeostasis? (Think:
why will she die?)