slide1 l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
INVERTEBRATES PowerPoint Presentation
Download Presentation
INVERTEBRATES

Loading in 2 Seconds...

play fullscreen
1 / 41

INVERTEBRATES - PowerPoint PPT Presentation


  • 158 Views
  • Uploaded on

EVERYTHING YOU ALWAYS WANTED TO KNOW ABOUT:. INVERTEBRATES. WHAT MAIN CHARACTERISTIC IS SHARED BY ALL VERTEBRATES?. IF YOU SAID BACKBONE, YOU ARE CORRECT!. VERTEBRATES ARE MEMBERS OF THE PHYLUM CHORDATO - (from the name notochord )also called Chordates. CHORDATE Characteristics:.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'INVERTEBRATES' - niveditha


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide3

IF YOU SAID BACKBONE, YOU ARE CORRECT!

VERTEBRATES ARE MEMBERS OF THE PHYLUM CHORDATO - (from the name notochord)also called Chordates

slide4

CHORDATE Characteristics:

At some time in life they have: NOTOCHORD, or nerve cord - a rod like structure that supports back.

slide6

SOME VERTEBRATES have backbone made of CARTILAGE (connective tissue - softer than bone but still strong!

slide7

Backbones run down center of back.

  • Made up of VERTEBRAE lined up in a row.
  • Joints between vertebrae give you flexibility
slide9

COW

BACKBONE

FISH

slide10

The backbone is part of the ENDOSKELETON (internal skeleton). It’s job:

  • SUPPORT
  • PROTECT
  • GIVES BODY SHAPE
  • A PLACE FOR MUSCLES TO ATTACH
slide11

Endoskeleton also includes the skull(protects brain as u see in my picture), ribs(protects organs), arm and leg bones (help you move)..but YOU already knew that!

slide12

How can you tell the difference between types of vertebrates?

BODY TEMPERATURE

Fish, amphibians, reptiles are ECTOTHERMS - body temp. changes with environment.

Birds and mammals are ENDOTHERMS - body controls temp by controlling internal heat it produces.

slide13

One last fact about vertebrates:

Chordates have slits in their throat called PHARYNGEAL

Most other vertebrates have their pharyngeal slits disappear before birth.

PHARYNX

slide14

PHARYNGEAL SLITS

Fish keep these slits all their lives as part of their gills.

slide16

HOW DO FISH USE THEIR GILLS?

WHAT ARE THE 3 GROUPS OF FISH?

slide17

FISH:

  • vertebrates that live in water
  • fins for movement
  • ectothermic
  • gills to breathe
  • have scales - overlapping plates that protect skin
slide18

OBTAINING O2

Fish swim along, open their mouth & take in H20

The H20 moves thru mouth to gills

GILLS: feather-like structures - red in color due to blood vessels in them.

slide20

Like all vertebrates, fish have a closed circulatory system. The heart pumps blood in a loop:

HEART GILLS BODY HEART

slide21

MOVEMENT

FINS:thin membrane stretched across bony supports

slide22

FEEDING

FISH have highly developed nervous systems and sense organs to help in capturing food and avoiding predators

Well, not like this…..more like….

slide23

Their eyesight is better than yours (remember there is less light under water)

Sharks can smell and even taste a tiny amount of blood - as little as one drop- in 115 liters of water! That is 57.5 two liter sodas!

slide24

AND some fish have taste organs in the most unusual places. Catfish have taste organs on their whiskers!

slide25

FEEDING

Some fish like the barracuda have sharp teeth for stabbing food

slide27

Filter Feeders like the Basking Shark and Manta Ray use comb-like structures on their gills to filter tiny plants and animals from the water.

slide28

Fish Reproduction

Most fish have external fertilization: as female releases eggs, male spreads a cloud of sperm over them.

Some fish like guppies and sharks have internal fertilization: when the eggs are mature enough to live on their own, female gives birth.

slide29

Biologists classify fish into 3 groups:

  • Jawless Fishes
  • Bony Fishes
  • Cartilaginous Fishes

They are grouped according to their mouth structure and type of skeleton

slide31

Jawless Fish

  • No scales
  • skeletons made of cartilage
  • one fin (no pairs of fins)
  • jawless mouth scrapes, stabs and sucks to get food

Lampreys are eel shaped parasites-use sharp teeth and suction-cup mouth to feed

slide33

CARTILAGINOUS FISH

Sharks, Rays, Skates

  • Skeletons made of cartilage
  • Have jaws and pairs of fins
  • Pointed, tooth-like scales cover bodies - rougher than sandpaper
  • Carnivores
  • Rays and Skates live on ocean floor - filter feeders - east mollusks, crustaceans, small fishes
slide34

CARTILAGINOUS FISH - Sharks

  • Streamlined bodies for quick movement
  • Mouth on bottom part of head
  • Jagged teeth arranged in rows - 1st couple rows are for feeding - remaining rows are replacement teeth. If a tooth is lost, one from next row moves up (NO DENTURES EVER NEEDED!)

Sharks

slide36

CARTILAGINOUS FISH - Sharks

  • Swimming or currents move water over gills
  • Spend most of time hunting for food - will attack anything that smells like food.
  • Poor eyesight - that is why they swallow strange objects at times.
slide38

BONY FISH

Most familiar fish are bony fish: trout, tuna, flounder, salmon, goldfish, etc.

  • Covered with scales
  • Pocket on each side of head that holds gills - flap over gills opens to release water
slide39

BONY FISH

Swim Bladder and Buoyancy

Fish neither sink or float. They have an organ called a SWIM BLADDER - sac that stabilizes body at different depths. It contains O2, nitrogen & CO2...

slide40

Swim Bladder and Buoyancy

...if the gas is less the fish sinks lower - if it is more the fish moves higher in the water. The change in the gas volume affects the Buoyancy Force - force that water exerts upward on any underwater object

LESS

THINK BALLOONS!

MORE

slide41

Bony Fish Diversity

  • Make up 95% of all fish species
  • Live in salt and fresh water
  • Some live in deep water and some in shallow