Chapter 4 Introduction To Animals Flashcards Preview

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Flashcards in Chapter 4 Introduction To Animals Deck (24):
1

Homeostasis

Keeping internal body conditions stable

2

Adaptations

Structures and behaviors that allow animals to perform their functions

3

Vertervrates

Animals with a backbone

4

Invertebrates

Animals without a backbone

5

Tissue

A group of similar cells that performs a specific function

6

Organ

Made up of different tissues

7

Bilateral symmetry

Only one line of symmetry can be drawn to divide it into halves that are mirror images

8

Radial symmetry

A circular mirror

9

Chordates

Have three characteristics: a notochord, a nerve cord and pouches in the throat area

10

Notochord

A flexible rod that supports a chordates back

11

Vertebrae

Makes up the backbone

12

Ecotherm

An animal that produces its own body heat

13

Endothermic

An animal that controls the internal heat it produces and regulates its own temperature

14

Fish

A vertebrate that lives in water and uses fins to move.

15

Cartilage

A tissue more flexible than bone

16

Amphibian

A vertebrate that is ectothermic and spends its early life in water an dits adult life on land

17

Reptile

An ectothermic vertebrate that has scaly skin and elungs and lays eggs on land

18

Bird

An endothermic vertebrate that lays eggs and has feathers and a four chambered heart

19

Mammals

Endothermic vertebrates that have skin covered with fur or hair and a four chambered heart

20

Mammary glands

Milk produced by organs

21

Monotremes

Lay eggs

22

Marsupials

Born at an early stage of development in a pouch on the mothers body

23

Placental mammal

Develops inside its mothers body until its body systems can function independently

24

Placenta

Materials are exchanged between the mother and the embryo