Body Organization
Section 1-1
Cells, Tissues, Organs
• A group of cells working together is called a
tissue
• There are four major types of tissue:
– Muscle tissue
– Nervous tissue
– Connective tissue
– Epithelial tissue
Epithelial tissue
• Covers and protects underlying tissue
• Epithelial tissue can be found on the outside
of our skin and on the outside of our organs
Nervous tissue
• Sends electrical signals throughout our body
• It makes up our brain, nerves, and sense
organs
Muscle tissue
• Made of cells that contract and relax to
produce movement
Connective tissue
• Joins, supports, protects, nourishes, and
cushions organs
• There are many different kinds such as
ligaments and even blood
How the body is organized
Tissues
Organs
Organ
systems
Homeostasis
• The maintenance of a stable
internal environment
• The body is able to maintain fairly constant
body temperature, blood sugar, water level,
etc.
• Our body is able to do this because of
specialized cells, tissues, and organs
Body Systems Chart
• Use your book, pages 6-7, and your muscle
partner to fill in the organ systems chart.
• Remember that organs are groups of tissues
that work together…therefore… a bone is an
organ too!