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Ch 17 G.H. Biology
Guest Hollow Biology Chapter 17 vocab
| Term | Definition |
|---|---|
| amniote | animal that produces eggs with internal membranes that allow gases but not water to pass through so the embryo can breathe without drying out (reptile, bird, or mammal) |
| animal | heterotrophic, multicellular eukaryote with cells that lack cell walls, member of the animal kingdom |
| exoskeleton | non-bony skeleton that forms on the outside of the body of some invertebrates and provides protection and support |
| invertebrate | animal that lacks a vertebral column, or backbone |
| notochord | stiff support rod that runs from one end of the body to the other in animals called chordates |
| vertebral column | bony support structure that runs down the back of a vertebrate animal, also called a backbone |
| vertebrate | animal with a vertebral column, or backbone |
| bilateral symmetry | symmetry of a body plan in which there are distinct head and tail ends, so the body can be divided into two identical right and left halves |
| cephalization | concentration of nerve tissue in one end of an animal, forming a head region |
| coelom | fluid-filled body cavity |
| complete digestive system | digestive system consisting of a digestive tract and two body openings (mouth and anus) |
| ectoderm | outer embryonic cell layer in animals |
| endoderm | inner embryonic cell layer in animals |
| hydrostatic skeleton | type of internal support in an animal body that results from the pressure of fluid within the body cavity known as the coelom |
| incomplete digestive system | digestive system that consists of a digestive cavity and a single opening that serves as both mouth and anus |
| larva (plural, larvae) | juvenile stage that occurs in the life cycle of many invertebrates, fish, and amphibians and that differs in form and function from the adult stage |
| mesoderm | embryonic cell layer in many animals that is located between the endoderm (inner cell layer) and ectoderm (outer cell layer) |
| pseudocoelom | partial, fluid-filled cavity inside the body of some invertebrates |
| radial symmetry | symmetry of a body plan in which there is a distinct top and bottom but not distinct head and tail ends, so the body can be divided into two halves like a pie |
| segmentation | division of an animal body into multiple segments |
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khirschy
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