Lesson 7 ·Class 9 · Tissues : Plant and Animal Tissues · Sort Lab
Muscle Tissue
Three ways the body moves.
Sort each feature into the type of muscle it belongs to.
Sorted 0/9
All items sorted — check each bin.
Free play — sort every item into the bin it belongs in; each correct drop tells you why. Switch to when you're ready to test yourself.
Cardiac muscle is the odd one out: it looks striated but behaves involuntarily, like smooth muscle.
What this lesson covers
Challenges to clear
- Fill the Cardiac bin correctly.
- Sort every feature.
- Fill the Unstriated box — the muscle that works without you telling it to.
The task
Sort each feature into the type of muscle it belongs to.
What this lesson covers
- Striated — Skeletal, voluntary: Under conscious control (You decide when to move your arm.); Attached to bones by tendons (Which is why it is also called skeletal muscle.); Powerful but tires quickly (It cannot work continuously without rest.)
- Unstriated — Smooth, involuntary: Spindle-shaped cells with one central nucleus (No cross-bands, hence smooth or unstriated.); Found in the walls of the stomach, intestine and blood vessels (It does the slow, sustained work of the internal organs.); Contracts slowly and does not tire easily (Peristalsis has to continue for hours.)
- Cardiac — Heart muscle: Branched fibres joined by intercalated discs (The branching lets the whole heart contract as one unit.); Contracts rhythmically without ever resting (About 70 times a minute for a whole lifetime.); Striated in appearance but involuntary in action (This combination is unique to heart muscle — a favourite exam point.)
Hint
Cardiac muscle is the odd one out: it looks striated but behaves involuntarily, like smooth muscle.