4.18.24 Movement Legacies, Reflection, and Review.pptx
Human system
1. HUMAN SYSTEM
Our body is a wonderful machine. It has many soft
and hard organs. These organs perform vital
functions in the body. These are two main types of
organs. They are external organs and internal
organs. External Organs are those parts of body
that can be seen. The soft organs present inside our
body that cannot be seen are known as Internal
Organs. These organs are protected by hard bones.
The internal organs of our body form different
groups called Organ System to carry out the
functions of the body . For example :- heart, veins,
arteries, capillaries and blood together for the
circulatory system of our body.
2. 1) The skeleton system- bones.
2) The muscular system- muscles.
3) The nervous system- brain,
spinal chord and nerves.
4) The respiratory system- nose,
trachea and lungs.
5) The circulatory system- heart,
blood vessels and blood.
6) The digestive system- mouth,
stomach, liver, teeth, large and small
intestines.
7) The excretory system- kidneys,
urethra, urinary bladder and ureter.
4. How do bones work?
Our bones don't work on their own.
The bones join together to form joints.
The end of each bone is covered by a
tough, smooth shiny substance called
cartilage that works like oil in a car.
All of this is so your bones won't
scratch and bump against each other
when you move. Our bones are held
together by strong stretchy bands
called ligaments.
5. •Thesmallest bones in the body are found in the ear.
•Thelongest bone in the bodyis the femur.
•Thebones arefilled with something called bonemarrowwhich makes redand white blood
cells.
•Overhalf the body's bones arein the hands and feet.
•Theonly joint-less bone in your body is the hyoid bone in your throat.
•As your bones grow, you get taller.
When you wereborn, your skeleton had around 350 bones.
•By the time you become an adult, you will only have around 206 bones. This is because, as you
grow,someof the bones join together toform one bone.
7. Muscles Work?
•Muscleswork ina very simpleway.Alltheydois
tightenup--thatis,contract--andrelax.
•Youhavetwosetsofmusclesattachedtomany of
yourboneswhichallowthem tomove.
•Musclescanonlypull.Theyneverpush.
14. WHAT IS THE IMPORTANCEOF THE
CIRCULATORY SYSTEM?
The circulatory system
regulates the blood
flow and body
temperature. We can
feel our heartbeat by
putting our hand on the
left side of our chest.
Our heart beats 72
times in a minute.
