Levels Of Biological Organization Biology Worksheets Page 3
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3Bones (___________)
Nucleus (___________)
Brain (___________)
In most vertebrate animals, the brain
Bones are rigid organs that form part
is the central organ of the nervous
of the endoskeleton of vertebrates.
This organelle contains the cell’s
system. It controls the other systems
They help to move, support and
genetic material (DNA) and therefore
of the body by either activating
protect the body as well as producing
controls the cell’s activities.
muscles or releasing chemicals.
red and white blood cells.
Stomach (___________)
Heart (___________)
Endoplasmic Reticulum (__________)
The stomach is a muscular, hollow
The heart is a muscular organ found
The endoplasmic reticulum is an
organ that works with the digestive
in all animals with a circulatory
organelle that forms an
system. It releases enzymes and
system. It is responsible for pumping
interconnected network of tubules
strong acids that help to break down
blood throughout the body through
that serve to transport newly
food to release useable energy.
the use of coordinated contractions.
synthesized proteins.
Nervous (___________)
Circulatory (___________)
Connective (___________)
Connective tissue is made of a
This system transports nutrients
network of protein fibers that provide
(gases, hormones, etc.) carried in
This system contains a network of
structural support. Bone, blood,
blood and lymph throughout the
specialized cells called neurons that
cartilage, and fat are the four main
body. It is powered by the involuntary
coordinate actions by transmitting
types of connective tissue.
contractions of the heart.
signals throughout the body.
Integumentary (___________)
Smooth Muscle (___________)
Smooth tissue is able to contract on
The integumentary system consists of
its own without a signal from the
the skin and its appendages (hair,
brain. These involuntary contractions
feathers, nails, etc.). It serves to
help organs such as the stomach and
protect the body as well to detect
intestines to break down and move
pain, sensation, and pressure.
food through the digestion process.
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