Biology of Hydra

List of ContributorsPrefaceIn MemoriamPart I Behavior of Hydra Chapter 1. Behavior I. Introduction II. Locomotory Activity III. Feeding Behavior IV. Response to External Stimulation V. Summary References Chapter 2. Feeding and Digestion I. Food Capture II. Ingestion of Food III. Digestion ReferencesPart II Ecology of hydra Chapter 3. Ecology I. Introduction II. Some Preliminary Considerations III. Planktonic Phases IV. Environmental Crises and Hydrid Defenses V. Energetic Capital Investments of Hydrid Populations VI. Conclusion ReferencesPart III Polarity in Hydra Chapter 4. The Developmental Significance of Interstitial Cells during Regenerationand Budding I. Introduction II. Experimental Analysis of Regeneration and Budding in Hydra Treated with Nitrogen Mustard to Selectively Eliminate Interstitial Cells III. Theoretical Aspects of Regeneration and Budding in Animals Devoid of Interstitial Cells References Chapter 5. Expression and Maintenance of Organismic Polarity I. Review of Evidence Accumulated at Various Levels of Biological Organization II. Growth Patterns III. Theories Analyzing the Control of Polarized Form IV. Prospectus ReferencesPart IV Gastrodermal Regeneration in hydra Chapter 6. Ultrastructural Changes during Dedifferentiation and Redifferentiation in the Regenerating, Isolated Gastrodermis I. Introduction II. Epidermal Differentiation — Dedifferentiation and Redifferentiation III. Epidermal Differentiation — Transformation IV. Gastrodermis V. Gastric Cavity VI. Formation of the Mesoglea VII. Summary and Conclusions ReferencesPart V Epidermal Regeneration in Hydra Chapter 7. Regeneration from Isolated Epidermal Explants I. Introduction II. Methods III. Results IV. Discussion V. Summary References Chapter 8. Epithelial-Muscle Cells Text References Chapter 9. Regeneration of a Hydra Containing No Interstitial Cells from an Isolated Basal Disc I. Introduction II. Materials and Methods III. Results IV. Discussion References Chapter 10. Interspecific Grafting of Cell Layers I. Introduction II. Methods III. Results and Discussion References Chapter 11. Regeneration of a Complete Hydra from a Single, Differentiated Somatic Cell Type I. Introduction II. Normal Regeneration III. Dedifferentiation of Specialized Cell Types into I-Cells IV. Epidermal Regeneration V. Regeneration of Animals Lacking I-Cells VI. Regeneration of Whole Hydras from Explants Consisting Solely of Epitheliomuscular Cells VII. Discussion ReferencesPart VI Differentiation of Nervous Elements in Hydra Chapter 12. Ultrastructure of Neurosensory Cell Development I. Introduction and Historical Review II. Neurosensory Cell Development III. The Mature Neurosensory Cell IV. Fate of Neurosensory Cells References Chapter 13. Ultrastructure of Ganglionic Cell Development I. Introduction II. Early Development III. Later Development IV. Mature Ganglionic Cell References Chapter 14. Structure of Neurosecretory Cells with Special Reference to the Nature of the Secretory Product I. Introduction II. The Neurosecretory Cell III. Mechanisms of Neurosecretory Release IV. Nature of Neurosecretory Material ReferencesPart VII Cell Proliferation and Morphogenesis in Hydra Chapter 15. Organismal Growth and the Contribution of Cell Proliferation to Net Growth and Maintenance of Form Part I. Organismal Growth Part II. The Contribution of Cell Proliferation to Net Growth and Maintenance of Form ReferencesPart VIII The Mesoglea of Hydra Chapter 16. The Mesoglea I. Mesoglea as Connective Tissue II. Physicochemical Structure of Mesoglea III. Mesoglea as a Dynamic Structure IV. Mesoglea Origin V. Morphogenic Role ReferencesAuthor IndexSubject Index