Summary of lesson: Types of Cells and Body Systems
- Different levels of organization of the human body:
Cells
* Building blocks of
life.
* Basic unit of all
living things.
Ex:
- Red blood cells →
carry oxygen to
organs and tissues.
- Nerve cells →
responsible for
picking and sending
information.
Tissue
* Group of cells share
same function.
Ex:
- Epithelial tissue →
barrier between the
inside and outside our
body. (heart – liver)
- connective tissue →
maintains the form of
body organs and
provides internal
support. (blood)
- muscle tissue →
provides movement.
- Nerve tissue →
transmits electrical
impulses.
Organs
* made of different
types of tissues and
cells that work
together.
Organ System
* 2 or more organs
working together.
Ex:
- Digestive System
- Respiratory System
- Circulatory System
- Muscular System
- Skeletal System
- Urinary System
- Nervous System
- Reproductive System
Organism
* All organs work
together to form an
organism.
Ex:
- Multicellular
organisms
Organ System
Digestive System
Circulatory System
Skeletal System
Function
Convert food into energy and basic nutrients.
Transport material through the body. Transport oxygen and
nutrients to body cells and carries away wastes.
Main Organs
Stomach, intestines,
mouth, esophagus
Heart, vessels, blood
Provides our body with structure and protects our main organs.
Bones
Respiratory System
Responsible for the exchange of oxygen and carbon dioxide
between the blood and the external environment.
Lungs
Nervous System
Controls the body vital functions like sleeping and breathing.
Brain, spinal cord, nerves
Muscular System
Responsible for the movement of the body.
Urinary System
Filters the blood from wastes and excess water.
Muscles
Bladder, kidneys