Biology Basics
What tiny structures make up all living things
Cells
Which system helps you breathe?
Respiratory system
Where does digestion begin?
Mouth
What organ helps you breathe in oxygen?
Lungs
Which sense uses your eyes?
Sight
What is the science that studies living things?
Biology
Which system moves blood around your body?
Circulatory system
What tube carries food to the stomach?
Esophagus
What muscle moves down when you breathe in and helps your lungs expand?
Diaphragm
What does the cerebellum help you do?
Balance and coordinate movements
Name 3 main part of a cell
Nucleus, cell membrane, or cytoplasm
Which system helps your body move and protects organs?
Musculoskeletal system
Which part of the intestine absorbs most nutrients?
Small Intestine
What tube carries air from your nose and mouth down to your lungs?
Trachea
What do nerves do?
Carry messages to and from the brain
Why is it important to study living things?
It helps us learn how the body works and how organisms interact and stay healthy.
Which two parts form the central nervous system?
Brain and spinal cord
Name the three macronutrients.
Carbohydrates, proteins, fats
What are the tiny air sacs in the lungs where oxygen enters the blood?
Alveoli
Name all five senses.
Sight, hearing, touch, taste, smell
Explain in one sentence what the cell membrane does
It protects the cell and controls what enters and leaves.
Give one example of how two body systems work together.
Digestive & circulatory: nutrients → blood → body
Respiratory & circulatory: oxygen → blood → body
Nervous & muscular: brain sends signals to muscles
Describe peristalsis in your own words.
Muscles squeeze and push food through the digestive system.
Explain what happens inside your body during inhalation and exhalation.
Inhalation: The diaphragm moves down, lungs expand, and air is pulled in.
Exhalation: The diaphragm relaxes and moves up, lungs shrink, and air is pushed out.
Describe what happens in your nervous system when you touch something hot and pull away fast.
Nerves send a danger signal to the brain, and the brain sends a message to your muscles to move your hand.