Chapter 8 : Introduction to animals Lesson # 1: What are ... · Crayfish . Chapter 9 : ... Animals are born with behaviors called instincs. ... exoskeleton(a hard outer covering)

Chapter 9 : Introduction to animals

Lesson # 1: What are animals?

Objective : Classify animals according to

their body´s structure





How do scientists group animals?

Scientists group animals by using the symmetry of

their body.

Animals classification by symmetry:

- Bilateral symmetry

- Radial symmetry

- Asymmetry









Examples of bilateral symmetry animals:

Butterfly

Turtle

Crayfish





Examples of radial symmetry animals:

Coral polyp

Sea star

Jellyfish





Examples of Asymetry animals:





Scientist use two method to classify animals in groups:

- Taxonomy : organize living things according to common

traits

- Family tree: shows the relationships among and within

generations of a family. Show the organization among the

same taxonomy



Objective : Classify animals according to their

body´s structure

Taxonomy

structure:

-




body´s structure

Taxonomy

structure:

-




body´s structure

Family Tree:

-




body´s structure

What is adaptation?

Is an inherited trait that increases an organism´s chance of surviving and reproducing in its environment.

Types of animal adaptations:

- Structural

- Behavioral

- Functional




body´s structure

Structure adaptations:

Have structural adaptations that includes their senses,skeletons, and circulation.

Examples:

-Snakes can detetct infrared light and insects can senses ultraviolet light. These can help them detect the presence of food or an enemy.




body´s structure

Behavioral adaptations:

Animals are born with behaviors called instincs.

Examples:

-A male fly instinctively waves its wings at a female to attract

its attention , and young songbirds learn how to sing their

songs by listening to their parents.




body´s structure

Functional adaptations:

Enable them to increase survival or maintain homeostasis.

Example:

- Enable animal to reproduce successfully either in water or

on land.(amphibians)


Lesson # 2: Invertebrates

Objective : Observe the differences between

invertebrates and vertebrates

Invertebrates : animals without backbones , support their

bodies with hydrostatic skeleton(fluid-filled internal cavity) or

exoskeleton(a hard outer covering).





Types of invertabrates animals:





Types of invertabrates animals:


Lesson # 3: Vertebrates



vertebrates : animals with backbones , support their bodies

with an endoskeleton.




invertebrates and vertebrates Examples of vertebrates animals:




invertebrates and vertebrates Examples of vertebrates animals:

Documents

Chapter 8 : Introduction to animals Lesson # 1: What are ... · Crayfish . Chapter 9 : ... Animals are born with behaviors called instincs. ... exoskeleton(a hard outer covering)