⚡ Rapid Revision: Plant & Animal Tissues
Part A: Plant Tissues
🌱 Meristematic
Active Dividing cells; found at tips (Apical) and sides (Lateral).
🍂 Permanent
Cells that have lost the power to divide and attained a fixed role.
💧 Xylem
Dead tissue; conducts Water/Minerals; flow is strictly Upward.
🍃 Phloem
Living tissue; conducts Food (Sugar); flow is Bidirectional.
Part B: Animal Tissues
🛡️ Epithelial
Covering/Protection. Shapes: Squamous, Cuboidal, Columnar.
🔗 Connective
Binds organs. Includes Blood, Bone, Ligaments, and Tendons.
💪 Muscular
Responsible for movement. Types: Striated, Smooth, and Cardiac.
🧠 Nervous
Control and Coordination. Functional unit is the Neuron.
Must-Know Vocabulary
- ✅ Lignin: Organic polymer that makes Sclerenchyma cells dead and hard.
- ✅ Sieve Plates: Perforated end-walls in Phloem sieve tubes.
- ✅ Ligaments: Elastic tissue connecting Bone to Bone.
- ✅ Tendons: Fibrous tissue connecting Muscle to Bone.
- ✅ Dendrites: Hair-like structures of a neuron that receive signals.
Ligament
Bone 🔗 Bone
Bone 🔗 Bone
⚡
Tendon
Muscle 🔗 Bone
Muscle 🔗 Bone
Tissue Differentiation Table
| Feature | Plant Tissues | Animal Tissues |
|---|---|---|
| Growth | Restricted to certain regions. | Uniform throughout body. |
| Cell Nature | Many are Dead for support. | Mostly Living cells. |
| Energy | Low consumption. | High energy consumption. |
Muscle Properties
- 📌 Striated: Voluntary; has dark/light bands; moves our limbs.
- 📌 Non-Striated: Involuntary; spindle-shaped; in internal organs.
- 📌 Cardiac: Involuntary; branched; rhythmic and never fatigues.
Exam Tip: Identification
If a diagram shows a cell with many nuclei and bands, it is always Striated Muscle. If it has branches, it is always Cardiac.
End of Tissue Revision Notes