Transcript The Human Body - jviningedu521

The Human Body
EDU 521
Jessica Vining
What are the systems of the body?
Respiratory System
Circulatory System
Skeletal System
The Respiratory System
What is the major organ involved in the
human body’s respiratory system?
Correct!

The major organ of the
respiratory system is the
lungs.
 Oxygen is taken into the
body through your nose
and mouth.
 The oxygen then travels
down your trachea,
through the bronchi, and
into the lungs.
 Oxygen enters the blood
stream through the
bronchioles and
alveoli.
Respiratory System Vocabulary

Lungs: The lungs are one of the
largest organs in the human body,
and make it possible for you to
breathe. They are responsible for
providing oxygen to your blood cells
and the rest of your body.

Trachea: The trachea is the medical
term for what you might call your
wind pipe. Air travels down the
trachea, which leads to the
bronchus/bronchi.

Bronchi: The bronchi stem off from
the end of the trachea and into either
side of your lungs, feeding into the
bronchioles.

Bronchioles: Bronchioles are like
small branches that stem from the
bronchi.

Alveoli: Alveoli are attached to the
ends of each bronchiole, and feed
fresh oxygen to the blood cells of the
human body.
The Circulatory System
True or False:
The most important organ
in the circulatory system,
the heart, is actually a
muscle.
True
B. False
A.
Correct!

The heart is made up of four
different parts, or chambers. The
two chambers on the top are
called the atria, and the two
bottom chambers are called the
ventricles.
 The heart’s main job is to pump
blood the atria and the ventricles,
where the blood cells pick up fresh
oxygen and then return to the
blood stream.
 There are four valves in the heart
which help direct the blood with
fresh oxygen back to the blood
stream. These are called the
mitral, tricuspid, aortic, and
pulmonary valves.
What about circulation?

Once the re-oxygenated blood
leaves the heart, it travels
through veins and arteries,
which together are called your
blood vessels.

Arteries are the blood vessels
that carry newly oxygenated
blood away from the heart.
Veins are the blood vessels that
carry blood back to the heart to
get re-oxygenated.

It takes the heart only 60
seconds to pump blood to every
cell of your body.
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The Skeletal System
Human bones are essential for what purpose?
A. To provide protection
to internal organs such
as the lungs, heart,
brain, and spinal cord.
B. To provide the support
necessary for activities
such as walking.
C. To create blood
cells for the body.
D. All of the above.
Correct!
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The human skeletal system has many important
functions, including providing protection for vital organs
such as the brain, lungs, heart, and spinal cord.
Bones are made up of four layers: the periosteum,
compact bone, cancellous bone, and bone marrow. Click
here to see a diagram of the layers of a bone. For an
explanation of what each specific layer does, click here.
When a baby is born, their body contains about 300
separate bones. As you grow, some of your bones fuse
or grow together. When you are a full grown adult, your
body contains 206 total bones.
Layers of a Bone
The Four Layers of a Bone

The outermost layer, the periosteum, contains nerves,
as well as blood vessels which feed the bone.
 The next layer is called the compact bone. This layer is
hard and smooth; you would recognize it as what you
see when you look at a skeleton!
 Cancellous bone might remind you of a sponge, but
while it is not as hard as compact bone, it is still very
strong!
 The innermost layer of a bone is the bone marrow.
Bone marrow is responsible for creating blood cells for
the rest of the body. It might remind you of a dense jelly!
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Sources
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