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Animal Systems

Animal Systems. Page 738: Body Symmetry & Chapters 27 through 28. What is an animal?. Scientific Definition Animal: eukaryotes that are multicellular heterotrophs that do not have a cell wall. FYI…. 3-30 million species 97% of all species are invertebrates. Invertebrates.

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Animal Systems

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  1. Animal Systems Page 738: Body Symmetry & Chapters 27 through 28

  2. What is an animal? Scientific Definition Animal: eukaryotes that are multicellular heterotrophs that do not have a cell wall.

  3. FYI… • 3-30 million species • 97% of all species are invertebrates Invertebrates

  4. The vast majority of animals are Arthropods (1,170,000 to 10 million species) • Of all invertebrates, the insects (part of the arthropods) are by far the most numerous. About 1-30 million+ species • For comparison, chordates (including mammals) consist of about 75,000 species Chordates Arthro + pod  Arthropod “jointed” + “foot” or “leg” “jointed leg” Arthropods

  5. Some terms used to describe animals

  6. Body Symmetry • Asymmetrical = without symmetry • Radial Symmetry =symmetry around a central axis • Bilateral Symmetry • can be divided into symmetrical halves on either side of a plane

  7. Examples of Asymmetrical Animals Porifera (Sponges) This is a cut out piece for marketing uniformity

  8. Radial Symmetry

  9. Animals with Radial Symmetry

  10. Examples of Animals with Bilateral Symmetry

  11. Body Orientation (used in humans) Do not let this intimidate you… • The Anatomical Position: The anatomical position describes a person that is standing erect with the feet facing forwards, arms hanging to the sides, and the palms of the hands facing forward. Directional terms are always from the patient’s perspective. When we refer to the right side we are referring to the patient’s right side =

  12. Body Planes of Animals(including humans)

  13. Directional Terms • Right and left – Refers to the Patient’s right or left side • Proximal – Near, closer to the originDistal – Away from, farther from the origin • Lateral – Toward the side, away from the mid-lineMedial – Toward the mid-line, middle, away from the side

  14. Directional Terms • Superior – Above, OverInferior – Below, Under • Anterior – In front of, frontPosterior – Behind, toward the rear • Ventral – Toward the bellyDorsal – Toward the back

  15. Directional Terms Quick Check

  16. Directional Terms Quick Check

  17. Other animal examples…

  18. Vocabulary Medial Posterior Proximal Radial Symmetry Right and left Sagittal (or Median) Superior Transverse (or Horizontal) Ventral • Anatomical Position • Anterior • Asymmetrical • Bilateral Symmetry • Distal • Dorsal • Frontal (or Coronal) • Inferior • Lateral

  19. Due tomorrow at the beginning of class: • Write a story using seven of these words (as they are used in biology) EXCLUDING right and left. • No definitions in your story. • I must be able to tell that you know what the word means from the story. • No more than one vocabulary word in a sentence. • If I can’t read your handwriting, I wont.In other words TYPE IT or write legibly. • No legible first name, last name, OR period = LATE

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