Science VOCAB May 14
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30 terms
Terms | Definitions |
|---|---|
 Chordate | Animals that at the same time in its development has a notochord, nerve cord, and pharyngeal |
| Notochord | Firm but flexible structure that extends along the upper part of a chordate's body |
| Postanal Tail | Muscular structure at the end of a developing chordate |
| Nerve Cord | Tubelike structure above the notochord that in most chordates develops into the brain and spinal cord |
| Pharyngeal Pouches | In developing chordates, the paired openings found in the area between the mouth and digestive tube |
| Endoskeleton | Supportive framework of bone and/or cartilage that provides an internal place for muscle attachment and protects a vertebrate's internal organs |
| Cartilage | Tough, flexible tissue that joins vertebrae and makes up all or part of the vertebrate endoskeleton |
| Vertebrae | Backbones that are joined by flexible cartilage and protect a vertebrate's spinal nerve cord |
| Ectotherm | Vertebrate animal whose internal temperature changes when the temperature of its environment changes |
| Endotherm | Vertebrate animal with a nearly constant internal temperature |
| Fin | Structure used by fish for steering, balancing, and movement |
| Scale | Thin, hard plates that cover a fish's skin an protect its body. |
| Hibernation | Cyclic response of inactivity and slowed metabolism that occurs during periods of cold temperatures and limited food supply |
| Estivation | Inactivity during hot, dry months |
| Amniotic Egg | Egg covered with a shell that provides a complete environment for the embryo's development; for reptiles, a major adaptment for living on land |
| Contour Feather | Strong, lightweight feathers that give their birds their coloring and shape and that are used for flight |
| Imprinting | Occurs when an animal forms a social attachment to another organism during a specific period following birth or hatching |
| Down Feather | Soft, fluffy feathers that provide an insulating layer next to the skin of adult birds and that cover the body of younger birds |
| Preening | Process in which birds rub oil from oil glands over it's feathers to condition and waterproof them |
| Mammal | Endothermic vertebrates that have hair, teeth specialized for eating certain foods, and mammary gland, in females, mammary glands produce milk for feeding their young |
| Mammary Gland | Milk producing glands of female mammals used to feed their young |
| Monotreme | A mammal that lays eggs with tough, leathery shell and whose mammary glands do not have nipples |
| Marsupial | A mammal with an external pouch for the development of its immature young |
| Placental | A mammal whose offspring develops in a female uterus |
| Gestational Period | Period during which an embryo develops in the uterus; the length of time varies among species |
| Placenta | An organ that develops from tissue of the embryo and tissues that line the inside of the uterus and that absorbs oxygen and food from the mother's blood |
| Umbilical | Connects the embryo to the placenta; moves food and oxygen form the placenta to the embryo and removes the embryo's waste products |
| Behavior | The way different organisms interact |
| Reflex | An automatic response |
| Instinct | A behavior an animal is born with, not learned |
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