Ppt gerak hewan copy

DALAM RANGKA APA HEWAN BERGERAK?
.

. Gerak pada hewan sendiri
ternyata dilakukan salah satunya
1. sebagai perlindungan diri
terhadap musuh,
2. mencari mangsa/ makan,
3. melakukan migrasi untuk
mencari daerah yang lebih
hangat
4. Menanggapi rangsang
NEXT!

Samakah alat gerak pada hewan yang habitatnya berbeda.? Mengapa
demikian ? Jelaskan!
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Alat gerak hewan darat
Alat gerak hewan darat
Alat gerak hewan darat dapat berupa kaki, atau otot perut.
Kaki digunakan untuk melompat, berjalan atau berlari.
Hewan yang bergerak dengan kaki adalah Arthropoda (hewan beruas,
seperti laba-laba dan kepiting), Amphibia (katak, salamander), Reptilia
(hewan melata seperti kadal,ular) Aves (burung) ketika di darat
Mamalia (hewan menyusui seperti sapi dan kuda).
Mekanismenya
Kaki digerakkan dengan meregangkan (kontraksi) dan melemaskan
(relaksasi) otot di kaki untuk mengangkat dan memindahkan kaki ke
depan atau ke samping.
Otot perut digunakan sebagai alat gerak oleh hewan darat tidak berkaki
seperti ular dan siput (Gastropoda). Pada hewan-hewan ini, otot perutlah
yang mengalami peregangan dan pelemasan, untuk mendorong hewan
darat ke depan.

Ciri-ciri rangka hewan mamalia
Contoh hewan mamalia adalah sapi, banteng kuda, kijang, harimau,
paus, Mamalia ada yang hidup di darat, udara, dan juga air.
Karakteristik atau ciri rangka dari hewan mamalia
1. memiliki tulang yang kokoh dan kuat untuk menopang tubuhnya.
2. Ototnya elastis, ramping dan kuat .
3. memiliki sendi-sendi yang kuat untuk mempermudah geraknya
( dapat bergerak dengan lincah..
Sehingga hewan seperti kuda dapat berlari dengan sangat cepat atau
kencang. Kijang dan Harimau memiliki bentuk kaki yang ramping dan
mampu menyimpan elastisitas tinggi yang mengakibatkan saat berlari
kijang dan harimau sering melompat dan meluncur diudara.
Gaya gesek udara jauh lebih kecil dari pada gaya gesek permukaan tanah
membuat kijang dapat berlari dengan kecepatan yang lebih tinggi dari pada
kuda

Alat gerak hewan udara
Hewan udara dapat bergerak dengan sayap.
Sayap ini dapat terbuat dari membran kulit, seperti pada kelelawar, atau terbuat
dari lapisan bulu, seperti pada burung.
Sayap burung tersusun atas kerangka yang kuat dan ringan serta otot yang kuat.
Hewan udara bergerak dengan mengepakkan sayapnya , saat sayap
dikepakkan, sayap memberikan gaya aksi terhadap udara dibawah sayap
sehingga udara akan mengalir ke bawah
Pada burung kepakan sayap ini digerakkan oleh otot terbang yang melekat pada
tulang dada.
Hewan udara dapat terbang karena memanfaatkan reaksi dari udara ketika
burung mengepakkan sayapnya, untuk membuat gaya angkat melawan
gravitasi.

Alat gerak hewan air
Alat gerak hewan air adalah sirip.
Ikan bergerak di air dengan cara berenang
Air memiliki kerapatan dan gaya angkat yang lebih besar dibanding dengan
massa jenis ikan, inil menyebabkan ikan dapat melayang di dalam air dan
dengan energi yang sedikit saja ikan bisa bergerak.
Selain karena massa jenis ikan yang lebih kecil dibanding dengan
lingkungannya, bentuk tubuh ikan juga mempengaruhi kemampuan ikan untuk
bergerak. Hal ini dikarenakan ikan memiliki bentuk tubuh yang aerodinamis
(streamline) untuk mengurangi hambatan ketika bergerak didalam air,
sehingga ikan mudah bergerak di dalam air.
Tubuh ikan dilengkapi dengan otot dan tulang belakang yang fleksibel untuk
mendorong ekor dan sirip ikan di dalam air. Dimana, sirip samping dan sirip ekor
yang lebar bisa berfungsi membantu mendorong gerakan ikan ke depan,
sehingga ikan akan bergerak lebih cepat

Bagaimana dengan cumi-cumi
Beberapa hewan seperti gurita dan cumi-cumi tidak bergerak dengan
sirip, tetapi dengan propulsi atau semprotan air. Mereka menyedot air
ke dalam kantung otot di rongga mantel yang mengelilingi tubuh
dengan cepat mengeluarkannya. Semprotan air ini mendorong maju
kedepan.

The Slide Title Goes Here!
Do you know what helps to make your point
clear? Lists like this one:
● They’re simple
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● You’ll never forget to buy milk again, that’s
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And the most important thing: the audience
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Maybe You Need to Divide the Content
Mercury
Mercury is the closest
planet to the Sun and
the smallest one
Venus
Venus has a beautiful
name and is the second
planet from the Sun
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Contents
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You Could Use Three Columns...
Mars
Despite being red,
Mars is actually a
cold place
Jupiter
Jupiter is a gas
giant and the
biggest planet
Saturn
It’s composed of
hydrogen and
helium
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Contents
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A Picture Is Worth a
Thousand Words

Do You Have Pending Tasks?
Do Homework
Go to Piano Class
Call Amanda
Clean the Desk
Math Exercises
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Write here important notes!
● This is an item from your list!
Bullet Points Could Be Useful!
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Awesome
Words
Because key words are great for catching
your audience’s attention
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This Is a Graph!
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Number of
Students
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Infographics Make Your Idea
Understandable...
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Mercury
Jupiter
Jupiter is the
biggest planet

…And the Same Goes for Tables!
Mass Diameter Gravity
Mercury 0.06 0.38 0.38
Mars 0.11 0.53 0.38
Saturn 95.2 9.4 1.16
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This Is a Map!
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Timeline
Saturn is the
ringed planet
Jupiter is the
biggest planet
Mars is red and
a cold place
Venus has a
beautiful name
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Contents
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Important Notes!
555-12134
Call:
Don’t
Forget!
Do Homework
Science Work
Important!!! To Do:
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To Do Lists!
● Write here a task!
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Important Numbers
Mercury is the
smallest planet
2,300
Mars is red and a
cold place
3,566
Jupiter is the
biggest planet
1,345
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498,300
Big numbers catch your
audience’s attention
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33% Venus is the second planet
from the Sun
Mercury is the closest
planet to the Sun20%
Despite being red, Mars
is actually a cold place47%
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Photo Board
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Review of Concepts
Jupiter
Jupiter is the
biggest planet
Saturn
Saturn is ringed
and a gas giant
Neptune
It’s very far from
planet Earth
Mercury
Mercury is the
Smallest planet
Venus
Venus has a
beautiful name
Mars
Despite being red,
Mars is cold
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Contents
Section 2
Section 3
Section 4
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Our Team
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