Track quiz
The eleven rules first. Then the quiz.
| Idea | The rule |
|---|---|
| A tissue | A tissue is a group of cells working on one job. They are usually similar. |
| Epithelial | Epithelial tissue covers the body and lines the organs inside. Its cells are packed close, and its shape fits its job. |
| Connective | Connective tissue joins and supports other tissues. Its matrix decides how hard or soft it is. |
| Muscle | Muscle tissue moves the body by shortening. Skeletal muscle is voluntary. Smooth and cardiac muscle are involuntary. |
| Nervous | Nervous tissue is made of neurons. A neuron gets a message at its dendrites. The axon carries it on. |
| Meristem | Meristem is plant tissue whose cells keep dividing. Apical meristem lengthens. Lateral meristem widens. Intercalary meristem lets grass regrow after cutting. |
| Xylem and phloem | Xylem carries water and minerals up from the roots. Phloem carries food from the leaves to other parts. |
| Joints | A joint is where bones meet. Muscles pull on bones through tendons. The kind of joint decides which movements are possible. |
| Plant skin | The epidermis is the outer skin of a plant. Its stomata let gases and water vapour pass. |
| Supporting tissues | Parenchyma has thin walls and stores food. Collenchyma has thick corners and bends. Sclerenchyma has thick lignin walls and is hard. |
| Blood | Red cells carry oxygen. White cells fight germs. Platelets help blood clot. Plasma carries food and hormones. |
The heart is made of muscle, nerve and blood tissue. What is the heart?
Which tissue covers the inside of the mouth?
Which tissue joins a muscle to a bone?
Which muscle is found only in the heart?
Which part of a neuron receives signals?
The tip of a root is cut off. What happens?
Which meristem lets grass regrow after mowing?
Which plant tube is made mostly of dead cells?
Which joint lets you swing your arm in a circle?
Which part of a leaf's epidermis lets gases pass?
A plant tissue has thin walls and gaps between its cells. It stores food. Which tissue is it?
Which part of blood helps it clot at a cut?
This is Chapter 3 once more, Exploration — Tissues in Action.
Next is Describing Motion Around Us. How do we describe a moving thing?