Body Organization
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What do you do when it is cold outside?
When it is hot?
◦ Shiver or sweat
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Homeostasis is the maintenance of a stable
internal environment
◦ Your body systems work together to ensure that
your body maintains a stable internal environment
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Body Organization
◦ Cells
◦ Tissues
◦ Organs
◦ Organ Systems
◦ Organism
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We are multicellular organisms
◦ We are made up of over 1 trillion cells
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We have many different types of cells
◦ Examples: Blood cells, muscle cells, bone cells
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Every cell has a specific job it carries out
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Epithelial
◦ Covers and protects underlying tissue
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Nervous
◦ Sends electrical messages throughout the body
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Muscle
◦ Contracts and relaxes to produce movement
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Connective
◦ Joins, supports, protects, and cushions bones
(joints)
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Two or more tissues working together
◦ Examples: Heart, lung, kidney, brain
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The integumentary system includes your skin,
hair, nails – these protect underlying tissue
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Your muscular system works with the bones
in the skeletal system to help you move
You have over 800 muscles in your body!
(of the 800, about 650 just move bones)
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The skeletal system provides a frame to
support and protect your body parts
The skeleton contains 206 bones and weighs
about 20 lbs
(you actually have over 300 bones at birth but some fuse together as you grow)
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The cardiovascular system pumps blood
through all of your blood vessels
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The nervous system receives and sends
electrical messages throughout the brain and
body
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The lymphatic system returns leaked fluid to
blood vessels and helps get rid of germs that
can harm you
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The digestive system breaks down food into
nutrients that can be absorbed by the body
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The endocrine system contains glands that
regulate body functions by sending out
chemical signals (aka hormones)
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The respiratory system allows the body to
absorb oxygen and release carbon dioxide
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The urinary system effectively removes
wastes from the blood and regulates fluids
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Male
◦ The male reproductive system produces and
delivers sperm
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Female
◦ The female reproductive system produces eggs and
can hold unborn babies
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You will be creating a Human Body Booklet
In order to find the information to fill this
booklet you will be using textbooks and the
literacy library books along with activities
associated with each system
You and your desk partner will be working
together on the same system at the same
time
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You will have 5 days to complete your
booklets (you will need to average 2 systems
per class period)
This will count as a grade and your study
guide for your human body quiz