Digestive System
What is the first organ that food enters after it leaves the mouth?
The oesophagus.
Which organ pumps blood around your body?
The Heart
Which organs allow us to breathe?
The lungs
Which body system gives your body support and shape?
The skeletal system.
What is the difference between a vertebrate and an invertebrate?
Vertebrates have a backbone; invertebrates do not.
What is the name of the ball of chewed food that travels down the oesophagus?
bolus
What are the larger tubes (not veins) that carry blood away from the heart
arteries
What is the tube that carries air from the mouth and nose to the lungs.
The trachea
Name two bones that protect important organs.
Skull (brain) and ribs (heart and lungs).
Name three vertebrates and three invertebrates.
Various
What is the wave-like muscle contractions that move food through the digestive system.
peristalsis
What do they call the 4 parts of the heart?
Chambers
When we breathe, what do we breathe in and what do we breathe out?
breathe in oxygen and breathe out carbon dioxide
Why do muscles work in pairs?
Muscles can only pull, so one contracts while the opposite muscle relaxes.
A hard outer skeleton that protects the body of many invertebrates.
Exoskeleton
Which organ absorbs most of the nutrients from digested food?
Small Intestine
Why does your heart beat faster during exercise?
To pump more oxygen and nutrients to working muscles and remove carbon dioxide more quickly.
What are alveoli and what is their job?
Tiny air sacs where oxygen enters the blood and carbon dioxide leaves the blood.
Name 3 muscles in your body
biceps, triceps, quadriceps, glutes
Why is a backbone an important adaptation for vertebrates?
It supports the body, protects the spinal cord, and provides attachment points for muscles.
Explain how the digestive and circulatory systems work together after you eat.
The digestive system breaks food into nutrients, which are absorbed by the small intestine into the bloodstream. The circulatory system then transports those nutrients to cells around the body.
Explain how the circulatory and respiratory systems work together during physical activity.
The respiratory system brings oxygen into the lungs. Oxygen enters the blood at the alveoli, and the circulatory system carries it to the muscles while returning carbon dioxide to the lungs.
Describe the journey of oxygen from the air to your muscles.
Nose/mouth → trachea → bronchi → alveoli → blood → heart → arteries → muscles.
Name 5 different bones in your body
Various
What is a shark skeleton made of?
Cartilage