Tissue Classification Flowchart
Frog Heart & Respiration Flow
Frog Anatomy — Wikimedia Illustration
No labeled dissection diagram available. Key internal anatomy: three-chambered heart (2 atria + 1 ventricle), bilobed liver, paired mesonephric kidneys, sac-like lungs, 10 pairs cranial nerves, cloaca as common exit for digestive, excretory, and reproductive products.
Muscle Type Quick-Reference Table
| Feature | Skeletal | Smooth | Cardiac |
|---|---|---|---|
| Striation | Yes | No | Yes |
| Voluntary | Yes | No | No |
| Nuclei | Many (peripheral) | 1 (central) | 1–2 (central) |
| Cell shape | Cylindrical, unbranched | Spindle | Branched |
| Special feature | Rapid, fatigable | Slow sustained | Intercalated discs, autorhythmic |
| Location | Bone-attached | Hollow organ walls | Heart wall only |
Histology Reference Images
Skeletal muscle (striated, voluntary, multinucleated, peripheral nuclei):
Cardiac muscle (striated, involuntary, intercalated discs, branched cells):
Smooth muscle (non-striated, involuntary, spindle-shaped, central nucleus):
Hyaline cartilage (chondrocytes in lacunae, chondroitin sulfate matrix):
Compact bone (osteocytes in concentric lamellae, Haversian canal system):
Adipose tissue (adipocytes with fat vacuoles — loose connective tissue):
Simple columnar epithelium (tall cells, basal nuclei, goblet cells — gut lining):
All histology images: Wikimedia Commons (CC BY-SA / Public Domain)