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BBY 3108: INVERTEBRATE ZOOLOGY SHORT NOTES
| Institution | University |
| Course | ZOOLOGY |
| Year | 1st Year |
| Semester | Unknown |
| Posted By | Mwalimu Evans Okoyo. |
| File Type | |
| Pages | 99 Pages |
| File Size | 1.11 MB |
| Views | 3020 |
| Downloads | 0 |
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Description
An invertebrate is any animal without an internal backbone which includes animals such as insects, crustaceans, worms, jellyfish and sponges. The diversity of invertebrate species far outnumbers that of the vertebrate animals. One group of invertebrates called Arthropods, which includes insects, spiders and crustaceans, contains almost 80% of all animal species. The remaining invertebrates constitute between 12-15% of all animal species.
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Anatomy of head and neck
The head is the globular cranial end of the body, which contains brain and special sense organs, viz. eyes for vision, ears for hearing and equilibrium, nose for smell, and tongue for taste. It also provides openings for the respiratory and digestive systems. Structurally and developmentally, the head is divided into two parts: cranium and face.
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