The skeletonal system is basically a bag of bones without
the ability of the muscular system to make the bones work together.
The skeletonal system is made up of bone mass, cartilage, and blood tissue.
The bones are living substances with many blood vessels running through
them. Bone marrow is where blood is made. Bones are porous,
but brittle. They can break if too much stress is applied on portions
of a bone. The muscles can attach themselves to parts of the bone
to make the bones move in unison. Cartilage acts as a protection
between bones so they do not damage the bone.
Flexibility is the ability to bend a joint or limb and to move
a muscle so that it bends a joint. The anatomy behind flexibility
is very complicated.
- The objective of this lab is to introduce students
to their own flexibility and to realize that muscles and joints play an
important role in movement. The students are to perform the
flexibility tests and to record whether they can or cannot do the exercise.
They will then tabulate the class results. You may want them to graph
their findings. Although girls are generally more flexible than boys,
some boys can be human rubberbands! Also note, that some of your
students may be double jointed, meaning that their bones have more movement
than most at the joints. They are capable of doing flexible acts
that most humans cannot.
- Depending on the size of the class may depend on how
you do this lab. You can do the exercise as a class, so you can watch
the students do each correctly. Demonstrate with one group of students,
give them time to write the information on their sheet. The other
way is to make stations and have the students follow the direction at each
station. You should time the students at each station so they can
finish the lab.
- BODY THROUGH BROOM
Step through a broom or stick. Then up and over. Don't let
- SQUAT WITH FEET FLAT
Keeping feet flat, squat without lifting your heals off the ground.
- HAND CLASP (FRONT)
Start with back of hands toward each other, cross arms, clasp palms together
(intertwine fingers), bring toward body still clasping hands, then extend
- HAND CLASP (BACK)
Put your right hand over the top of your shoulder, your left arm down and
toward your back. Try to clasp or touch hands.
- HAND CLASP (SHOULDER)
Holds hands in back, and bring up hands to shoulder length without moving
your upper body forward.
- KNEES TO SIT
Get down on knees and see if you can sit down.
- LEG TO CHEST
Bring one leg all the way up to chest, keeping the other leg flat on the
Put feet together, move feet 180 degrees, put one foot in front of the
other keeping them parallel.
- BEND TOUCH FLOOR
Students should bend their torso without bending their knees. They
should touch to floor with open palms.
- BEND TOUCH FLOOR, REVERSE
Do the same as above, but put one leg over the over leg before touching