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Year 9 Biology
The Human Body
Year 9 Biology
Cells, tissues, organs
• Organsims are made of cells
• A group of similar cells is called a tissue
• A group of different tissues working together
form an organ
• Organs working together form an organ system
Year 9 Biology
How is body organised?
CELL
TISSUE
A group of similar
cells is called a tissue
ORGAN
A group of
different
tissues form
an organ
Year 9 Biology
Name the major organs
• In groups make a list of the main
organs of the body
Year 9 Biology
Organs to organ systems
Next, different organs are linked together by tubes/ vessels…..
Organ 1
Organ 3
AnToorgan
system
become..
Organ 2
Organ 4
Year 9 Biology
Another example
Muscle cells
Muscle tissue
Organ
System
Organism
Year 9 Biology
Organ systems
• Make a list of all the organ systems
• Feedback below:
Year 9 Biology
Digestive System
Year 9 Biology
Digestive System -Gross and
Cool Facts!
• HOW LONG ARE YOUR INTESTINES? At least 25 feet in
an adult. Be glad you're not a full-grown horse -- their
coiled-up intestines are 89 feet long!
• Chewing food takes from 5-30 seconds
• Swallowing takes about 10 seconds
• Food sloshing in the stomach can last 3-4 hours
• It takes 3 hours for food to move through the intestine
• Food drying up and hanging out in the large intestine can
last 18 hours to 2 days!
• Americans eat about 700 million pounds of peanut butter.
• Americans eat over 2 billion pounds of chocolate a year.
• In your lifetime, your digestive system may handle about 50
tons!!
Year 9 Biology
Respiratory System
Year 9 Biology
Respiratory System- Gross and
Cool Facts!
• Your lungs contain almost 1500 miles of
airways and over 300 million alveoli.
• Every minute you breathe in 13 pints of air.
• Plants are our partners in breathing. We
breathe in air, use the oxygen in it, and
release carbon dioxide. Plants take in
carbon dioxide and release oxygen. Thank
goodness!
• People tend to get more colds in the winter
because we're indoors more often and in
close proximity to other people. When
people sneeze, cough and even breathe -germs go flying!
Year 9 Biology
Circulatory System
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Gross & Cool Facts!
Year 9 Biology
Circulatory System- Gross and
Cool Facts!
• The body of an adult contains over 60,000
miles of blood vessels!
• An adult's heart pumps nearly 4000 gallons
of blood each day!
• Your heart beats some 30 million times a
year!
• The average three-year-old has two pints
of blood in their body; the average adult at
least five times more!
• A "heartbeat" is really the sound of the
valves in the heart closing as they push
blood through its chambers.
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Year 9 Biology
Skeletal System
Year 9 Biology
Skeletal System
Gross and Cool Facts!
• The human hand has 27 bones; your face
has 14!
• The longest bone in your body? Your thigh
bone, the femur -- it's about 1/4 of your
height. The smallest is the stirrup bone in
the ear which can measure 1/10 of an inch.
• Did you know that humans and giraffes
have the same number of bones in their
necks? Giraffe neck vertebrae are just
much, much longer!
• You have over 230 moveable and semimoveable joints in your body.
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Year 9 Biology
Muscular System
Year 9 Biology
Muscular System
Gross and Cool Facts!
• You have over 30 facial muscles which
create looks like surprise, happiness,
sadness, and frowning.
• Eye muscles are the busiest muscles in the
body. Scientists estimate they may move
more than 100,000 times a day!
• The largest muscle in the body is the
gluteus maximus muscle in the buttocks.
Year 9 Biology
The Excretory system
Gets rid of waste
Year 9 Biology
Reproductive system
• To produce sex cells
and reproduce to make
offspring.
Year 9 Biology
Nervous system
• Send and receive
messages
• Controls quick
changes the body
Year 9 Biology
Endocrine system
• Produces
Hormones
• Controls slow
changes in the
body
Year 9 Biology
Task – draw around the body
• Add organs in
their correct
location
Year 9 Biology
Watch video – the human body
Year 9 Biology
Organs of the body
Name of system
Digestive
Respiratory
Circulatory
Excretory
Nervous
Skeletal
reproductive
Main
Main
organs functions
Stomach brain lungs kidneys testes
blood vessels, trachea, pancreas,
spinal cord, muscles, ovaries,
bladder, liver, liver, heart , skeleton
•Get rid of waste
•Carry oxygen and food around the body
•Take in oxygen – get rid of carbon dioxide
•Digest and absorb food
•Transmit messages around the body
•Support and move the body