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

A group of different tissues form an organ

ORGAN

A group of similar cells is called a tissue

TISSUECELL

How is body organised?

Year 9 Biology

Name the major organs

• In groups make a list of the main organs of the body

Year 9 Biology

Next, different organs are linked together by tubes/ vessels…..

Organ 1

Organ 2

Organ 3

Organ 4

To become..An organ system

Organs to organ systems

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

Menu 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 SystemGross 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 semi-moveable joints in your body.

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Year 9 Biology

Muscular System

Year 9 Biology

Muscular SystemGross 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 systemGets 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 bodyName of system Main

organs

Main functions

Digestive

Respiratory

Circulatory

Excretory

Nervous

Skeletal

reproductive

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