Transcript Lymphatic System

Bell Work: 12/8/14
• Using the Human
Body Quest Bell Work
packet, complete the
questions for
lymphatic and
immune systems.
• Use the page
numbers provided.
You are being timed! You only
get 10 minutes to complete
bell work!
Objectives
• Explain the basic functions of a major
organ system. (SPI0707.1.3)
41. Lymphatic and Immune Systems (one page)
Lymphatic System (pg. 242-245)
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The lymphatic system is a group of organs and
tissues that collect the excess fluid and return it
to your blood.
The fluid (lymph) is a clear, watery fluid that
contains protein molecules, salts, and glucose
that is carried by the lymphatic vessels and then
into the veins of the cardiovascular system.
The lymphatic system also helps your body fight
pathogens.
A pathogen is an infectious agent, or germ.
Lymphatic System (pg. 242-245)
Parts of the Lymphatic System:
1. Bone marrow is where most red and
white blood cells, including lymphocytes
are produced. Lymphocytes are a type of
white blood cell that helps your body fight
pathogens.
2. Lymphatic vessels
3. Lymph nodes are small bean-shaped
masses of tissue that remove pathogens
and dead cells from the lymph.
4. Thymus gland produces T cells
(lymphocytes) that surround and destroy
pathogens.
5. Spleen stores and produces
lymphocytes.
6. Tonsils are masses of lymphatic tissue
that help protect your throat and lungs
from infection by trapping pathogens.
• BrainPop- Lymphatic
Immune System
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The immune system is made up of a network of
cells, tissues, and organs that work together to
protect the body.
The first line of defense is the skin, which
protects the body from outside germs.
White blood cells, also called leukocytes, are
part of this defense system.
Two basic types of these germ-fighting cells:
1. Phagocytes- protect the body by ingesting harmful
foreign particles, bacteria, and dead or dying cells.
2. Lymphocytes
Immune System
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Once the lymphocytes have determined
that a bacterium or virus has entered the
body, B cells (produced in bone) produce
germ attackers called antibodies.
Anything that can trigger this immune
response, such as bacteria or viruses, is
called an antigen.
An antibody matches an antigen much as
a key matches a lock. Whenever antigen
and antibody interlock, the antibody marks
the antigen for destruction.
• BrainPop- Immune
MRSA
MRSA is a staph germ (bacteria)
that is spread by skin-to-skin
contact (touching). A doctor, nurse,
other health care provider, or
visitors may have staph germs on
their body that can spread to a
patient.
Once the staph germ enters the
body, it can spread to bones, joints,
the blood, or any organ, such as
the lungs, heart, or brain.
A body’s normal antibody
production usually cannot fight off
MRSA by itself. MRSA needs to be
treated with multiple rounds of
antibiotics.
Draining a skin infection may be the
only treatment needed for a skin
MRSA infection that has not
spread.
Mucus
Tears and mucus contain an
enzyme that breaks down the
cell wall of many bacteria.
Your nose and sinuses make
about a quart (about 1 liter) of
snot every day.
Mucus has a pretty important
job — it protects the lungs.
When you breathe in air
through your nose, it contains
lots of tiny things, like dust,
dirt, germs, and pollen. If these
made it all the way to the
lungs, the lungs could get
irritated or infected, making it
tough to breathe. Luckily, snot
helps trap this stuff, keeping it
in the nose and out of the
lungs.
Drawings
• For each body system, draw and color at
least one organ that belongs in that body
system.
• For example:
– Lymphatic System = tonsils, thymus, lymph
nodes, lymphatic vessels, spleen
– Immune System = antigens, antibodies, lockand-key
• Use your textbook pictures or the sample
sheet in the folder at your group.
Human Body Books
Interesting Facts
Lymphatic System:
• When you have an
infection, your lymph
nodes swell because they
fill up with lymphocytes
that are surrounding and
destroying bacteria.
• The small organs which
compose lymphatic
system are known as
lymph nodes. The
number of lymph nodes
present in our body range
from 500 - 700.
Immune System:
• It is very important to get
your beauty sleep for at
least 8 hours as under 5
hours of sleep can
significantly depress the
immune functions.
• The body has over 50
million white blood cells
that work to protect the
body's defense system.