Levels of Organisation
What is the basic unit of life?
a cell
Which body system supports and protects your body?
The skeletal system
Which body system helps you move and stay upright?
The muscular system
What does it mean to inhale?
To breathe air into the lungs
Which organ pumps blood around your body?
heart
What do we call a group of organs working together?
Organ system
What is the name of the bone in your upper leg?
femur
What does it mean when a muscle contracts?
It becomes shorter and tighter.
What is the name of the tube that carries air towards your lungs?
trachea
What are the tubes that carry blood around your body called?
Blood vessels
What do we call a group of similar cells working together?
A tissue
Which bone protects your brain?
The skull
Which type of muscle is attached to bones and helps move your body?
Skeletal muscle
What are the tiny air sacs where oxygen moves into the blood called?
Alveoli
Which gas does the blood carry from the lungs to cells throughout the body?
Oxygen
What do we call a group of tissues that form a body part?
an organ
Which bones protect your heart and lungs?
The ribcage
Which type of muscle moves materials through organs automatically?
Smooth muscle
What are the two tubes that carry air from the trachea into the lungs called?
bronchi
Which waste gas does the blood carry back to the lungs to be breathed out?
Carbon dioxide
Put these levels in order from simplest to most complex:
organ - organism -cell - organ system - tissue
Cell - tissue - organ - organ system - organism
Name three functions of the skeletal system.
Support, protection and producing blood cells
Which type of muscle pumps blood around your body, and where is it found?
Cardiac muscle; in the heart
What happens to your diaphragm when you inhale, and how does this help your lungs?
It flattens and moves downward, making more space for the lungs to expand.
ow do the respiratory and circulatory systems work together to deliver oxygen to your body?
The respiratory system brings oxygen into the lungs, where it moves into the blood. The circulatory system carries the oxygen to cells throughout the body.