From cells to organ systems

Science · Organisms & Life Processes · ages 11-12

Name ______________________ Date ____________

What do muscle cells working together to contract form?
- A circulatory system
- Muscle tissue
- A whole organism
Which level of organisation is the smallest?
- Cell
- Tissue
- Organ
A human organ system consists of one organ working alone.
Circle one: True False
The brain is an organ. Which organ system is it part of?
- Nervous system
- Circulatory system
- Muscle tissue
Which path follows the levels from a heart muscle cell to a whole organism?
- heart to muscle tissue to cardiac muscle cell to circulatory system to human
- circulatory system to heart to muscle tissue to cardiac muscle cell to human
- cardiac muscle cell to muscle tissue to heart to circulatory system to human
Why does a heart need many cells organised into different tissues?
- Each cell pumps blood on its own, so tissues only make the heart larger.
- Different tissues work together, including muscle tissue that contracts.
- The tissues replace all the cells, leaving a heart with no living cells.
Mia says nervous tissue cannot be a tissue because it contains nerve cells and support cells. Which explanation checks her claim?
- A tissue can contain different cell types working on a shared job.
- A tissue must contain one cell type, each doing a separate job.
- A tissue contains whole organs instead of cells working together.
Zac says, 'My skin is a single giant cell that covers my body.' Which explanation checks his claim?
- Skin is an organ system made of separate organs, with no tissues inside.
- Skin is one cell with smaller organs inside it, but it has no tissues.
- Skin is an organ with several tissue types, each containing many cells.

Answer key

For grown-ups. Fold this page away before handing over the rest.

From cells to organ systems W1-mt_7hB8s5eOP1-s1

Muscle tissue · Muscle cells working together form muscle tissue. Tissue is one level above its cells.
Cell · A cell is the smallest living building block. Groups of cells make up the bigger levels.
False · An organ system contains organs working together. The circulatory system includes the heart and blood vessels.
Nervous system · The brain and nerves are parts of the nervous system. Muscle tissue is a tissue, not an organ system.
cardiac muscle cell to muscle tissue to heart to circulatory system to human · A cardiac muscle cell belongs to muscle tissue in the heart. The heart belongs to the circulatory system in a human.
Different tissues work together, including muscle tissue that contracts. · Muscle tissue contracts to help pump blood. Other tissue types also help the heart work, so the organ needs their coordinated activity.
A tissue can contain different cell types working on a shared job. · Nervous tissue contains nerve cells and support cells. A tissue can include different cell types working together on a shared function.
Skin is an organ with several tissue types, each containing many cells. · Skin is an organ containing several tissue types. Those tissues contain many cells, so skin is not one giant cell.