The Circulatory System
MRS. J.A. FELICIANO
PARKWAY MIDDLE SCHOOL
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Quick LAB: Are you pulsating?

What is the pulse?

Find your pulse by using your index and middle fingers of your right hand and place them on your wrist
at the base of your thumb in your left hand. You should feel your pulse.

What is causing this pulsating feeling?

How fast do you think it is traveling per minute?

What should be the normal range of your pulse?

Stand away from your desk with enough space around to do 5 minutes of exercise.

Find your pulse again by using your index and middle fingers of your right hand and place them on
your wrist at the base of your thumb in your left hand.

Was there a change?

Use Human Body handout to fill in chart and answer questions.
Human Body Corporation:
CLOZE ACTIVITY

Use the note-taking handout and fill in correct answers as it
is discussed in this lesson.

Fill in Table of Content in the Science Interactive Notebook
with today’s lesson.

Glue handout to Science Interactive Notebook.
The Circulatory System
 The
circulatory system consists of the
heart, blood vessels, and blood.
 It
brings essential materials to all cells
of the body and carries away cell
wastes.
 The
circulatory system delivers
oxygen needed by the cells to
release energy from sugar
molecules and carries back carbon
dioxide to the lungs, where it is
eliminated when air is exhaled.
The Heart

The heart is a hollow muscular
organ that pumps blood
throughout the body.

The heart is about the size of your
fist.

Each time the heart beats, it
pushes blood through the it
pushes blood through the network
of arteries and veins called the
cardiovascular system.
4 Chambers of the Heart

The heart has 2 sides (right and left) that are
separated by a wall of muscle called the Septum
 Each
side has 2 chambers (upper and lower)
 Each
upper chamber is called an atrium
(receives blood that comes to the heart)
 Each
lower chamber is called a ventricle
(pumps blood out of the heart)
 Pacemaker
cells – cells located in the right
atrium that control the heart rate by electrical
impulses.
Task: 30 minutes
Draw or glue diagram of the
heart on the left side of your
Science Interactive
Notebook.
Color the different parts of
the heart and label them.
Indicate with arrows the
direction of blood flow.
Arteries, Capillaries and Veins



Arteries are blood vessels that carry blood
away from the heart.
Capillaries are tiny vessels that exchange
substances between blood and body cells.
Veins are blood vessels that carry blood back
to the heart.


Blood flows from arteries to capillaries, and
from capillaries to veins.
The aorta is the largest artery in the body.
4 Components of Blood

Plasma, the liquid part of blood.

Most materials carried in the blood travel in the plasma; nutrients
like glucose, fats, vitamins, minerals and chemical messengers
that direct body activities.

It also carries waste away from the cells.

Red blood cells carry oxygen from the lungs to the cells in the body.

White blood cells fight diseases.


It alerts the body when affected by organisms

Different White blood cells surrounds and kills invading organisms.
Platelets are cell fragments that form blood clots that help to repair
the cells and body.
Why is it important for a person to have a
healthy heart?

List 3 reasons for a healthy heart

List 2 conditions that affect the circulatory system

Can the human body live without any of the organs discussed in class today? Explain and
support your answer with text evidence.
The Respiratory System
ESSENTIAL QUESTION: WHAT IS THE ROLE OF THE
RESPIRATORY SYSTEM?
Lung capacity-

Activity 2: The students will find out what effects our lung capacity. The students will be
divided into groups to evaluate the lung capacity using a lung capacitor or balloons based on
different variables.
What is the function of the respiratory
system?

The respiratory system moves air containing oxygen into your lungs and
removes carbon dioxide and water from your body.
Parts of the Respiratory System






Nose - Air, containing oxygen, enters the body through
the nose
 The nasal cavity contains hairs that protects the body
from air bourn particles. (Sneeze)
Pharynx – the air passes into the pharynx, or throat.
Trachea - It then passes into the trachea, or windpipe,
where tiny hair like extensions known as cilia sweep
mucus up to the pharynx. (Cough)
Bronchi - Air then moves into the bronchi, which are
passages to the lungs,
Lungs - the main organs of the respiratory system.
Alveoli - the lungs consist of alveoli, which are tiny sacs
through which gases are exchanged with the blood.
Breathing

Breathing is controlled by rib
muscles, and the diaphragm.

When you breathe, your rib
muscles and the diaphragm
muscle work together, causing air
to move into or out of your lungs.
This airflow leads to the exchange
of gases that occurs in your lungs.
How does the circulatory system and
the respiratory system work together
to maintain homeostasis?

After air enters the alveolus, oxygen passes
through the wall of the alveolus and then
through the capillary wall into the blood.

Carbon dioxide and water pass from the
blood into the alveolus.

This whole process is called gas exchange.

Gas exchange is aided by the many
alveoli in the lungs.
Why is it important for a person to have a
healthy Lungs?

List 3 reasons for healthy lungs

List 2 conditions that affect the respiratory system

Can the human body live without any of the organs discussed in class today?
Explain and support your answer with text evidence.
Summative Assessment
Quick write: Reflection
Each student is required to defend their
answer in a narrative or illustration.

What is the major organ of the
Circulatory System?

What is the major organ of the
Respiratory System?

How do the circulatory and
respiratory systems work together to
maintain homeostasis