Starter: On the bottom of page 24 of your lab manual, write the common Kingdom characteristics for...
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Transcript of Starter: On the bottom of page 24 of your lab manual, write the common Kingdom characteristics for...
Starter: On the bottom of page 24 of your lab manual, write the common Kingdom characteristics for the Kingdom Animalia, including:
•Cell Type:•Cellular Organization:•Mode of Nutrition:•Cell Wall:•Habitat:
Kingdom ANIMALIA
Just what is an animal???
Eukaryotic (unlike Bacteria)
Multicellular (unlike most Protists)
Heterotrophic (unlike Plants)
Cells lack cell walls (unlike Fungi)
Animals are organized into nine phyla according to:•Level of organization – Cells Tissues Organs Organ
Systems
•Body symmetry – see next slide – Asymmetry, radial, & bilateral
•Cephalization – concentration of sensory tissue at the head
•Body cavity formation
Symmetry
What should YOU know about each phylum???how they get their food;how they keep from being another organism’s food;
& how they reproduceMajor characteristics (body plans)
Phylum Porifera - sponges
Characteristics:• means “pore bearer”
• simplest animals• All aquatic
Feeding: • filter feeding using protist-like chanocytes in pores
Defense Mechanisms:• Spine-like spicules and toxins
Locomotion:• Sessile (nonmoving) adults with free-swimming
gametes
Choanocyte
Skeletal System:• Can be hard with spicules or soft with spongin
Reproduction:• Reproduce both asexually (budding) and sexually
Symmetry:Asymmetrical – no ends or sides
Phylum CnidariaJellyfish, corals, sea anemone, hydra
Characteristics:•First to have tissues•Aquatic habitats
Feeding Mechanisms:•Single gastrovascular cavity through which food enters and waste leaves
Defense Mechanisms:•Can detect light, gravity, and touch•Stinging cells called cnidocytes are used for defense and food capture
Locomotion:•Polyps are sessile•Medusas use jet propulsion
Skeletal System (body plan)•Two types of body plan, polyp and medusa
Reproduction• Sexual and asexual (budding) reproduction
Symmetry:•Radial symmetry
PLATYHELMINTHESflatworms: flukes,
turbellarians, tapeworms
Characteristics•First group with organs•First cephalized group
•Free living flatworms (Planaria, e.g.): carnivores with gastrovascular cavity (actively pursue prey with pharynx)
•Parasitic flatworms (tapeworms, e.g.): absorb nutrients from host
•Defense: detect stimuli with eyespots (sense light)
•Locomotion: capable of movement with muscles and cilia
Skeletal System (body plan):Acoelomate - solid body construction
• There is no fluid-filled cavity (coelom)
Reproduction:•Hermaphroditic
• both sexes in one worm, two worms line up and exchange sperm
Symmetry:• Bilateral
Phylum NEMATODAroundworms: hookworms, heartworms, and pinworms
Characteristics:• Freeliving and parasitic
Feeding Mechanisms: • First group to have a separate mouth and anus• Parasitic, predators, or herbivores
Defense Mechanisms:• Sense organs detect chemicals of prey or hosts
Locomotion:• Use muscles to move
through water or soil
Reproduction:• Sexually, separate sexes• Parasitic roundworms
usually have more than one host
Symmetry:• bilateral
Skeletal System (body plan)• Pseudocoelomate - false body cavity
• There is a cavity, but it is not lined with mesoderm tissue
Phylum ANNELIDA
Segmented worms: earthworms, leeches, polychaetes
Characteristics:• Segments allow for more complex movement• first group with true organs and systems
Feeding:• Can be filter-feeders, predators, or detritovores (feed
on decaying materials)
Defense:• Well-developed nervous system• eyes
Locomotion:• Two types of muscles that work together for movement• Setae on segments (hair-like bristles)
Skeletal System (Body Plan):• Coelomate - true body cavity completely lined with
mesoderm
Phylum Mollusca
Class Gastropoda (snails & slugs),
Class Bivalvia (clams & scallops),
Class Cephalopoda (squids & octopi)
Feeding:•Gastropods use a radula to eat algae; Octopi use jaws; Clams, oysters, and scallops are filter-feeders
Defense:•Some highly intelligent w/ eyes and tentacles
Locomotion:•Cephalopods use jet propulsion
Skeletal System:•Foot – flat part of snails or tentacles of cephalopods•Mantle – tissue•Shell – internal or external
Reproduction:•Sexually – most release gametes wa
Reproduction:• Hermaphroditic or separate sexes• clitellum is used for fertilization
Symmetry:• bilateral
The ARTHROPODS
•“joint-footed”•largest phylum-96% of all animals
•73% of these are insects•aquatic and terrestrial
•Use specialized mouthparts like pinchers, fangs, jaws specialized according to whether they are Herbivores, Carnivores, or Parasites
•Most have sophisticated sense organs, such as taste receptors, for gathering information from the environment. All have a brain.
•Three body parts-head, thorax, and abdomen•exoskeleton made of chitin- which they
molt/shed as they grow
•Sexual reproduction, with separate sexes
•Bilateral Symmetry
CLASS CRUSTACEA: crabs, crayfish, barnacle•10 legs/appendages•2 or 3 body sections•Usually 2 pair antennae
CLASS INSECTA• Six legs, 1 pair antenna, 3 body parts
CLASS ARACHNIDA: Spiders, scorpions, ticks, mites, daddy longlegs
• 8 legs 2 body sections
PhylumECHINODERMATA
sea stars, sand dollars, sea biscuits, sea urchins, and sea
cucumbers
Characteristics:•Spiny skinned animals•Internal skeleton• Only phylum that is entirely marine (salt water-ocean)•Often keystone species-removal of them from their environment will cause the ecosystem to crash
Feeding:•Use tube feet to obtain food (turns stomach inside out and digests the body of the organism and withdraws the stomach containing food)
Defense:•Scattered sensory cells detect light, gravity, and chemicals released by potential prey
Locomotion:•Water vascular system to pump water through body to feed and move
Reproduction: •sexual (separate sexes) and asexual (regeneration)
Symmetry:•5-part radial symmetry (bilateral as larva)
Phylum CHORDATA (that’s us!)
All Chordates have:• Dorsal nerve cord• Notochord (becomes backbone)• Post anal tail• Pharyngeal pouches ( become gill slits in fish,
but become tonsils, esophagus, inner ear, etc. of humans)
Most chordates are Vertebrates (have a backbone)
Class Agnatha
• Jawless fishes• Ectothermic - body temp dependent
on temp of surrounding water• Often are external parasites of other fish• Examples: hagfish and lamprey
Class Chondrichthyes
• sharks, skates, rayssharks, skates, rays•Cartilaginous skeletonCartilaginous skeleton• First group to develop teeth, fins, First group to develop teeth, fins,
and scalesand scales
Class Osteichthyes• “Bony fish”• Examples—bass, trout, flounder
Class Amphibia•Amphibia means “two lived”: live in water as
juveniles and land as adults (gills turn in to lungs)• jelly-like eggs laid in water•first to have lungs•moist skin—gas exchange through skin and lungs•no teeth or claws• examples: frogs, toads, salamanders
Class ReptiliaAdapted for dry conditions
•Scaly skin, teeth and claws• leathery eggs laid on land•Examples: turtles, alligators, lizards,
snakes, and dinosaurs
Class Aves
• First to be endothermic-able to maintain constant body temperature regardless of surrounding temp.
• beak and scaly skin on feet• First 4-chambered heart: allows for more efficient
circulation•Adapted for flying
•Adaptations for flight1. Wings2. Feathers3. Hollow bones4. large breastbone for flight muscles
Class Mammalia
2. marsupials• immature young finish development in mother’s
pouch called marsupium•Examples: kangaroo and opossum
3. Placental mammals• give birth to live, well-formed young• Nutrients, oxygen, carbon dioxide, and waste
exchanged through placenta• Examples: cow, human, elephant, horse