Practice: cells, food and breathing
Practica lo que acabas de ver con preguntas interactivas.
Las preguntas de esta práctica
Puedes leerlas antes de empezar, hacerlas en un papel o repasarlas después. Cada una tiene su solución explicada.
- 1 · Cells
A living thing has only one cell. We say it is…
uni = one · multi = many
- a) unicellular
- b) multicellular
- c) a tissue
- d) an organ
Ver la solución
Respuesta: a) unicellular
With only one cell it is unicellular, like a paramecium. People, dogs and trees are multicellular.
- 2 · Organisation
What do we call a layer of cells of the same type?
It is the step after the cell.
- a) A system
- b) A tissue
- c) An organ
- d) An organism
Ver la solución
Respuesta: b) A tissue
Cells of the same type joined together make a tissue, like muscle tissue.
- 3 · Organisation
Drag the missing step
From the smallest to the biggest.
cell → tissue → ____ → system
Fichas: organ · organism · nutrient · blood
Ver la solución
Respuesta: organ
Cell → tissue → organ → system → organism.
- 4 · Organisation
The heart is made of muscle, connective and nerve tissue. So the heart is…
Different tissues + one job.
- a) a cell
- b) a tissue
- c) an organ
- d) a system
Ver la solución
Respuesta: c) an organ
Several tissues working together to do one job (pumping blood) make an organ.
- 5 · Digestion
Where does digestion begin?
Think about the bread on your tongue.
- a) In the stomach
- b) In the mouth
- c) In the small intestine
- d) In the blood
Ver la solución
Respuesta: b) In the mouth
It begins in the mouth: teeth break the food and saliva makes it soft.
- 6 · Match
Match each organ with its job
Follow the journey of the food.
- Oesophagus
- Stomach
- Small intestine
- Large intestine
- a) Carries the waste to the anus
- b) Mixes food with juices
- c) Sends nutrients into the blood
- d) Takes food to the stomach
Ver la solución
Respuesta: Oesophagus → Takes food to the stomach · Stomach → Mixes food with juices · Small intestine → Sends nutrients into the blood · Large intestine → Carries the waste to the anus
Mouth → oesophagus → stomach → small intestine → large intestine → anus.
- 7 · Digestion
What carries the nutrients to all parts of the body?
It travels through arteries and veins.
- a) Saliva
- b) Urine
- c) The blood
- d) The air
Ver la solución
Respuesta: c) The blood
The nutrients pass from the small intestine into the blood, and the blood takes them everywhere.
- 8 · Breathing
When we breathe in, which gas does our body take from the air?
Every cell needs it.
- a) Carbon dioxide
- b) Oxygen
- c) Water
- d) Sweat
Ver la solución
Respuesta: b) Oxygen
We breathe in oxygen and breathe out carbon dioxide.
- 9 · Breathing
Drag the organ that is missing
The path of the air.
nose → ____ → lungs
Fichas: trachea · oesophagus · stomach · bladder
Ver la solución
Respuesta: trachea
Air goes in through the nose and mouth, down the trachea and into the lungs. The oesophagus is for food!
- 10 · Hands on
In the bottle lung model, what does the balloon at the bottom of the bottle represent?
It is a big muscle under the lungs.
- a) The heart
- b) The trachea
- c) The diaphragm
- d) The stomach
Ver la solución
Respuesta: c) The diaphragm
The bottom balloon is the diaphragm: when you pull it down, the 'lungs' fill with air.
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