A Power Point Presentation for class IV students for better comprehension of the topic- Moving and Growing ( Science) I hope it was helpful. For more Presentations Like, Share and Comment.

1. Moving and Growing
By: Anushay Abrar

2. Bones and the Skeleton
● The hard parts inside your body are
called bones.
● There are 206 bones in the body of an
human adult.
● The bones form the skeleton of your
body.
● Babies are born with about 300 bones.
● Bones are made up of a mineral called
Calcium. (e.g Milk)
● Blood is made in the bone marrow which
fills some bones.

3. Functions of the Human Skeletons
★ The skeleton is like the wooden
framework of a house.
★ A skeleton supports the human body
and gives it a shape.
★ Without a skeleton for support, we
would be as floppy as a jelly fish on
land.
★ The human skeleton protects
important organs, such as the brain,
eyes, heart and lungs.
★ It allows a human being to move.

4. Skeletons of other animals
Skeleton of a Snake Skeleton of a Fish Skeleton of a Bat
Skeleton of Bird

5. Skeletons of other animals
➢ Not all animals have skeletons inside
their bodies. Some animals have
skeletons outside their bodies, while
others have no skeletons at all.
➢ The animals that have skeletons are
outside their bodies are called
Exoskeletons.
➢ Crabs, Lobsters, Beetles and Spiders
are some examples of Exoskeletons.
➢ Earthworm, Leech and Slugs are
some animals that do not have

7. JOINTS
What is a Joint?
➔ A joint is where two or more bones meet.
➔ Types of Joints:
➔ Ball-and socket joint -------------- l.e.g Hip joint
➔ Hinge Joint ----------------- Elbow Joint
➔ Pivot Joint ------------------- Neck Joint
➔ Saddle Joint -------------------- Thumb Joint

8. FUNCTION OF TYPES OF JOINTS
❖ Ball-Socket Joint: It allows movement in many directions, including back and
forth, side to side and circular movements. Some examples are Hip joint and
Shoulder Joint.
❖ Hinge Joint: A hinge joint works like a door. It allows back and forth
movements. Some examples of such joints are the knee joints, elbow joints,
finger joints and toe joints.
❖ Pivot Joint: A pivot joint allows the rotation of a bone about another. An
example of such joints is the neck joints.
❖ Saddle Joint: A saddle joint allows a bone to slide in two directions ------- back
and forth, as well as side to side. An example of such joints is the thumb joint.

9. ● Muscles are made up of tough,
elastic fibres that contract (shorten)
and relax to enable you to move.
● Muscles enable us to move.
● Without muscles, you will not be
able to walk, run, jump or dance
and even smile, talk, chew and
breathe.
● In fact, you will not be able to live
without muscles because your heart
is a muscular pump which works
non-stop to keep you alive.
MUSCLES AND TENDONS

10. ● Some muscles in your body, such as your
biceps,are attached to bones.
● When these skeletal muscles contract, they
pull on the bones and the bones move.
● Skeletal muscles can only pull but they
cannot push.
● Thus, they have to work in pairs.
● Not all muscles are attached to bones, your
heart muscles and those in the walls of your
stomach and intestines are not attached to
bones.
● They contract and relax to enable
movements that you cannot control.
MUSCLES AND TENDONS

11. TENDONS
❏ Tendons are strong cords in our body that
attach muscles to bones.
❏ When you bend and straighten your arm,
the tendon that connects your biceps to
your lower arm bone moves.
❏ The strongest and largest tendon is the
Achilles tendon that connects the muscles
in the lower leg to the heel bone.
How did the Achille tendon got its name?
★ The Achilles tendon got its name from a
Greek warrior named Achilles.

12. 20
The human