Download Third Grade Science Vocabulary

Third Grade Science Vocabulary
GOAL
WORD
PAGE
DEFINITION
ASSOCIATED CONCEPTS
The learner will conduct investigations and use appropriate technology to build an understanding of the form and function of
4
the skeletal and muscle systems of the human body.
R20-21
(part of the skeletal system) Frame that
Support: Gives the body shape
Bone
Protection: Protects the organs
supports the body
Locomotion: Works with muscles to move
the body
Each bone is the size and shape best fitted to
its job
R22
(part of the skeletal system) A place where
Three major groups:
Joint
two or more bones meet
IMMOVABLE JOINTS-bones fit together too
tightly to move (i.e. bones in the skull)
PARTLY MOVABLE JOINTS-bones can only
move a little (i.e. ribs are connected to the
breastbone with these joints)
MOVABLE JOINTS-bones can move easily
(i.e. gliding joint in hand and wrist, hinge
joint in the knee, ball and socket joint in the
hip & pivot joint in the neck)
R20-22
A system of the human body
Skeleton
R21
Soft tissue inside some bones
Yellow marrow is mostly fat cells and one of
Marrow
the body’s energy reserves-found in long
bones
Red marrow fill the spaces in spongy bonemakes new red blood cells, germ-fighting
white blood cells and cell fragments that stop
bleeding
A sheet or band of tough tissue connecting
Ligament/tendon R23
bones at a joint or supporting an organ.
R21
Sudden twist or wrench of a joint with
Treatment: keep the area above the level of
Sprain
stretching or tearing of ligament (usually a
the heart to avoid swelling
wrist, knee or ankle)
Page 1 of 3
Third Grade Science Vocabulary
GOAL
WORD
PAGE
DEFINITION
ASSOCIATED CONCEPTS
The learner will conduct investigations and use appropriate technology to build an understanding of the form and function of
4
the skeletal and muscle systems of the human body.
R20
A break or crack in bone
Treatment: must not be moved need medical
Fracture
attention
A tough, elastic connective tissue found in
reduces friction and imparts flexibility
Cartilage
Permanent cartilage remains throughout life,
various parts of the body, such as the joints,
as in the external ear, nose, larynx, and
windpipe (or trachea)
R23
Muscles attached to and move bones (part of Pull (do not push) bones to move them
Skeletal muscle
the Muscular System)
R23
Found only in one place—the walls of the
contract to squeeze blood our of the heart &
Cardiac muscle
heart (part of the Muscular System)
when they relax the heart fills with blood
R23
Make up internal organs and blood vessels
In the lungs help people to breathe, in blood
Smooth muscle
(part of the Muscular System)
vessels help control blood flow around the
body
Smooth muscle or "involuntary muscle" is
Also found in the heart
Involuntary
found within structures such as the intestines,
muscles
throat and blood vessels. It does not get tired.
Skeletal muscle or "voluntary muscle" is
Voluntary
anchored by tendons to bone and is used to
muscles
affect skeletal movement such as locomotion.
It gets tired.
R23
Reduce in size
When a muscle contracts it becomes shorter
Contract
and thicker—as the muscle contract it pulls
on the bone it is attached to
R24 &
The muscular chambers organ that pumps
is the size of a fist
Heart
25
blood received from the veins into the
arteries, maintaining the flow of blood
through the entire circulatory system.
Page 2 of 3
Third Grade Science Vocabulary
GOAL
WORD
PAGE
DEFINITION
ASSOCIATED CONCEPTS
The learner will conduct investigations and use appropriate technology to build an understanding of the form and function of
4
the skeletal and muscle systems of the human body.
Carry blood to and away from the heart
Arteries=blood back to heart
Blood vessels
Veins=blood away from the heart to the rest
of the body
R24 &
A liquid that contains red blood cells, white
Red blood cells: carry oxygen and nutrients
Blood
25
blood cells, and platelets.
to cells throughout the body
White blood cells: work to fight germs
Platelets: cell fragments that make the blood
clot
R26
Two spongy, saclike organs in the chest
Throat, trachea, lungs, alveoli and diaphragm
Lungs
cavity part of the Respiratory System
work together to inhale oxygen, exchange
and exhale carbon dioxide
Structures (in human body) made of at least
There are many different organs in the body:
Organs
two different types of tissue functioning
the liver, kidneys, heart, even your skin is an
together for a common purpose. .
organ
R23
Muscle that contacts to bend the arm and
Works in pairs with triceps-attached to
Biceps
pulls on the arm bone it is attached to
opposite sides of the same bones (see
diagram on R23)
R23
Muscle that contacts to straighten you arm-it Works in pairs with biceps-attached to
Triceps
pulls on the other side of the bone that is
opposite sides of the same bones
attached to
The unit of structure and function of which
The cell is the smallest unit in the living
Cells
all plants and animals are composed.
organism that is capable of integrating the
essential life processes.
R22
similar to a sliding door-allows bones to slide Allows some movement in all directions
Gliding Joint
against one another
R22
Is similar to a door hinge-allows bones to
one direction
Hinge Joint
move back and forth
R22
The ball fits into the socket, or cup, of
Allow bones to move back and forth, in a
Ball & Socket
another bone
circle and side to side
Joint
Page 3 of 3