Download Cells Tissues Organs Organ Systems

Big Idea
Science Standard 7.5.a:
Students know that plants and animals have levels of
organization for structure and function, including cells, tissues,
organs, organ systems, and the whole organisms.
Cells: the smallest units of organization in
the body.
Connective Tissue: provides support for
your body and connects all of its parts.
Muscle Tissue: allows your body to move
(can contract and shorten)
Nervous Tissue: directs and controls
movement( carries electrical messages back
and forth between the brain and other
parts)
Epithelial tissue: the tissue that covers your
body inside and out.
Homeostasis: the body’s tendency to keep
an internal balance.
Pathogens: disease causing bacteria and
viruses.
Stress: your body’s reaction to potentially
threatening, challenging, or disturbing
events.
The levels of organization in the human
body consist of cells, tissues, organs, and
organ systems.
Smallest unit
of organization
Largest unit of organization
 the second largest unit of organization in your
body (4 basic types of tissue)
1. Muscle tissue- contract and shorten
2. Nervous tissue – carries electrical charges to
brain and other parts
3. Connective tissue – provides support
4. Epithelial tissue – Cover your body inside and
out. (e.g. the skin provides protection)(e.g.
lining of the digestive system allows you to
digest and absorb nutrients from food.
 The human body has 11 organ systems
The Integumentary System
 Made up of you skin, hair, and nails.
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Cells and tissue work together to provide a
barrier from disease causing bacteria and
viruses.
Skin also helps regulate body temperature.
Also helps the excretory system remove waste
(sweating)
Works with the nervous system to give you
info about your environment.
 The human body has 11 organ systems
All systems of the body work together to maintain
homeostasis
HOMEOSTASIS IS THE PROCESS BY WHICH AN
ORGANISM’S INTERNAL ENVIRONMENT IS KEPT
STABLE IN SPITE OF CHANGES IN THE EXTERNAL
ENVIRONMENT
 Across Discipline: Language Arts (RC 2.2
(take notes on the 11 body systems. e.g
what organs are involved, how does the
system help maintain homeostasis.)
 Patterns: Draw and label one of the 11
body systems.(511-515)
 Question: Write a question and answer
it.
 Summary: Write a summary of what you
have learned.

The Skeletal System
 Made up of your bones and connective tissues.
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Supports the body and gives structure.
Protects your body’s organs
Connective Tissues attaches bones and form joints
that allow movement
The Muscular System
 work to move your body by pulling your skeleton
Voluntary Muscles – work when you want them to
Involuntary Muscles – work by themselves
Your muscles and bones are also know as the
Musculoskeletal system.
The Circulatory System
 Carries food and oxygen to all the cells of your
body.
Powered by the pumping of your heart.
Arteries – take blood away from the heart
Veins – carry blood toward the heart
Capillaries – smallest blood vessels connect
arteries and veins.
The Respiratory System
 lungs are the main organs in the respiratory
system
Takes in oxygen and disposes carbon dioxide
Delivers oxygen to the blood via circulatory system
The Digestive System
 helps breakdown food into small molecules the
body uses
The Excretory System
 Removes waste from you blood stream
Kidneys are the major organ in this system
Each kidney contains 1 million nephrons that filter
waste.
The Immune System
 Protects your body from disease-causing bacteria
and viruses called PATHOGENS.
Specialized white blood cells target and destroy
these PATHOGENS.
The Nervous System
 takes the information from your environment and
from within our body.
Processes information and demands the body to
respond
Includes the brain and spinal cord
Nerve cells reach form spinal cord to all parts of
the body
The Endocrine System
 helps regulate the activities of your organs and
organ systems.( releasing hormones)
Consists of Thyroid gland, Hypothalamus,
Parathyroid glands, Thymus gland, Pancreas,
Adrenal glands.
All systems of the body work together to
maintain homeostasis
HOMEOSTASIS IS THE PROCESS BY WHICH
AN ORGANISM’S INTERNAL ENVIRONMENT
IS KEPT STABLE IN SPITE OF CHANGES IN THE
EXTERNAL ENVIRONMENT