Chapter 30- An Introduction to Animals

0.0(0)
studied byStudied by 3 people
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
Card Sorting

1/27

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

28 Terms

1
New cards

Epithelium

is a layer of tightly joined cells that covers the interior and /or exterior surface of the animal.

2
New cards

Viviparous

" (live- bearing) "species such as humans and most other mammals nourish embryos inside the body and give birth to live young.

3
New cards

Metamorphosis

is a drastic change of form from one developmental stage to another.

4
New cards

Lophotrochozoans

grow continuously when conditions are good.

5
New cards

Spicules

are stiff spikes of silica or calcium carbonate (CaC03) that, along with collagen fibers, give structural support to the ECM.

6
New cards

Ectoparasites

live on the outside of their hosts.

7
New cards

Oviparous

" (egg- bearing) "species such as chickens and crickets deposit fertilized eggs.

8
New cards

Ecdysozoans

grow by shedding their external skeletons or outer coverings and expanding their bodies.

9
New cards

Cephalization

is the evolution of a head, or anterior region, where structures for feeding, sensing the environment, and processing information are concentrated.

10
New cards

Colonies

are groups of individuals that are attached to each other.

11
New cards

large mass of neurons

The that is located in the head, and that is responsible for processing information to and from the body, is called the cerebral ganglion or brain.

12
New cards

sessile polyp

Many cnidarians have a life cycle that includes both a(n) form that reproduces asexually and a free- floating medusa that reproduces sexually.

13
New cards

Herbivores

that feed on plants or algae.

14
New cards

indirect development

During , embryogenesis produces larvae.

15
New cards

evolution of αnimαls

The is more complicated than α smooth transition from simple to complex.

16
New cards

Ovoviviparous

" (egg- live- bearing) "species such as guppies and garter snakes retain eggs inside the body during early development, but the growing embryos are nourished by egg yolk instead of by nutrients transferred directly from the mother, as in viviparous species.

17
New cards

germ layer

In triploblasts, however, there is a(n) called mesoderm " (middle- skin) "between the ectoderm and endoderm.

18
New cards

multicellular eukaryotes

All animals are whose cells lack cell walls but have an extensive extracellular matrix (ECM)

19
New cards

Sponges

do not have complex tissues, groups of similar cells that are organized into tightly integrated structural and functional units.

20
New cards

Endoparasites

live inside their hosts and usually have simple, wormlike bodies.

21
New cards

Cnidarians

have nerve cells at are mostly organized into a diι fuse arrangement called a nerve net.

22
New cards

Segmentation

is defined as the division of the body or a part of the body into a series of similar structures.

23
New cards

radiation of animals

The began around 550 million years ago during an event called the Cambrian explosion.

24
New cards

embryonic tissues

The are organized in layers, called germ layers.

25
New cards

diploblasts

In 1ese germ layers are called ectoderm " (outer skin) "and endoderm ("inner- skin)

26
New cards

Cambrian explosion

The radiation of animals began around 550 million years ago during an event

27
New cards

benthic

they live at the bottom of aquatic environments

28
New cards

sessile

adults live permanently attached to a substrate rather than moving freely