GROUP MEMBERS 1.VIVIANA VELENTHIA MICHEAL (D20101037453) 2. ROS SALIMA BINTI M.ROS (D20101037483) 3. NIK IKHWAN BIN NIK LEE (D20101037491) 4. NIK SYARIHAH NIK MUHAMAD ZIN (D20101037454) 4. CLAUDIA MUSIH (D20101037447) BIOLOGY SBU 3023
GROUP MEMBERS1.VIVIANA VELENTHIA MICHEAL
(D20101037453)2. ROS SALIMA BINTI M.ROS
(D20101037483)3. NIK IKHWAN BIN NIK LEE
(D20101037491) 4. NIK SYARIHAH NIK MUHAMAD ZIN
(D20101037454) 4. CLAUDIA MUSIH
(D20101037447)
BIOLOGYSBU 3023
CHARACTERISTICS OF ANIMALS
• Heterotrophs must ingest others for nutrients
• Multicellular complex bodies
• No cell walls allows active movement
• Sexual reproduction no alternation of generations no haploid gametophyte
DIVERSITY OF BODY PLANS
• 5 BASIC FEATURE TO COMPARE SIMILARITIES AND DIFFERENCES OF ANIMALS :
1. Body symmetry
2. Cephalization
3. Type of gut
4. Body cavity
5. segmentation
Animals
Invertebrates
Cnidaria
Platyhelminthes
Nematoda
Mollusca
Porifera
Annelida
Vertebrates
Mammals
Fish
Reptiles
AmphibiansBirds
Arthropoda
Echinodermata
Cnidaria
• The name Cnidaria refers to the specialized cells called cnidocytes (Greek knide = nettle) which are unique to this phylum.
• Includes a diverse group of about 10,000 living species.
Cnidaria
• Most are marine
• Has specialized cells called cnidocytes that contain stinging cells to catch prey.
• Solitary or colonies.
• Body: Radially symetrical, hollow sac with mouth and surrounding tentacles.
• Mouth leads to gastrovascular cavity.[gastro = stomach; vascul = a little vessel]
Unique Characteristics
Two Body Shapes
Polyps : • Polyp form represented by Hydra • Cylindrical form.• Dorsal mouth surrounded by tentacles
Medusae : • Mouth located in the lower surface.• The tentacles of medusa dangle from the oral
surface which points downwards
Two Body Shapes
Polyps (many footed) :
-Cylindrical body.
-Top opening surrounded
by tentacles.
-Sessile (attached to
something).
eg. Hydra &sea anemone
b) Medusa b) Medusa
(jellyfish) :(jellyfish) :
-An umbrella-shaped
body.
-Bottom opening
surrounded by
tentacles.
- Float freely in water.
eg. Jelly fish.
Hydrozoa : Hydra sp- Polyp type“Stinging capsule” Containing Cnidocyte.
“Stinging cell” Release coiled thread to inject toxin when stimulated.
• Reproductive polyp lack tentacles and produce tiny medusa by asexual budding.
• Life cycle showing alternation of sexual and asexual stages.
• Asexual stage : A polyp colony composed of 2 types of polyp
a) reproductive polyp b) feeding polyp• Feeding polyp are equipped with
tentacles Sexual stage : ~ A male medusa produce sperm ~ A female medusa produce egg
• Reproductive polyp lack tentacles and produce tiny medusa by asexual budding.
• Life cycle showing alternation of sexual and asexual stages.
• Asexual stage : A polyp colony composed of 2 types of polyp
a) reproductive polyp b) feeding polyp• Feeding polyp are equipped with
tentacles Sexual stage : ~ A male medusa produce sperm ~ A female medusa produce egg
Hydrozoa : Obelia sp. - Polyp & medusa type
Life cycle of Obelia sp.
• Reproductive polyp lack tentacles and produce tiny medusa by asexual budding.
• Feeding polyp are equipped with tentacles.
Life cycle of Obelia sp.
• The medusa swim off and male medusa produces sperm.
• Female medusa produces eggs.Fertilization is external.
• The zygote develops into a solid cilliated larva known as planula.
• The planula eventually settles and develop into a new polyp.
• The polyp stage is asexual.
• Mostly marine, but include some freshwater inhabitant
• Usually found attached to the substratum in shallow or deep water.
• Obtain their food by filter feeding
• Multicellular
• Body with pores (ostia)
• No organs or true tissues.
• No nervous system
• Skeleton of calcareous spicules, siliceous spicules, spongin or a combination.
PARTS OF SPONGE DESCRIPTION
MesophyllThe wall of this sponge consist of two layer of separated by gelatinous matrix.
Epidermis The outer layer consist of tightly packed epidermal cell.
Pores Water enter the epidermis through pores formed by doughnut shaped cell that span the body wall.
Spongocoel Water passing through pores enter a cavity called the spongocoel
Choanocytes The spongocoel is lined with flagellated cell called choanocytes
The movement of choanocytes flagellum also draws water through its collar of fingerlike projection. Food particles are trapped in the mucus coating the projection , engulfed by phagocytosis, either digest or transferred to amoebocytes
Amoebocytes These cell can transport nutrient to other part of the sponge.
• Mostly sperm are hermaphrodites
• Almost all sponge exhibits sequential hermaphroditism, functioning first as one sex and then as the other.
• Sponge gametes arises from choanocytes or amoebocytes.
• Egg reside in the mesophyl but sperm are carried out of the sponge by water current.
• Cross-fertilization result from some of the sperm being drawn into neighboring individual.
• Fertilization occur in the mesophyl
Uses of Sponge
• Produce a variety of antibiotic and other defensive compounds.
• Researchers are now isolating these compound, which hold promise for fighting human diseases.
• Other sponge derived compound are being tested as possible anticancer agent
Sponge Taxonomy
Class Calcarea (Calcispongidae)
• Only sponges that possess spicules composed of calcium carbonate. • Spicules are straight or have 3-4 rays, and do not have hollow axial canals. • Today, their diversity is greatest in the tropics, predominantly in shallow waters
Taxonomy cont.
Class Hexactinellida (Hyalospongiae)
• Glass sponges; characterized by siliceous spicules consisting of six rays intersecting at right angles• Widely viewed as an early branch within the Porifera
Taxonomy cont.
Class Demospongiae
• Greater than 90 percent of the 5,000 known living sponge species are demosponges.• Demosponge skeletons are composed of spongin fibers and/or siliceous spicules• Siliceous spicules with one to four rays not at right angles, All members express the leuconoid body form
Yellow sponge growing on a wall on a Caribbean reef.
UNIQUE CHARACTERISTICS
• Body flattened
• Bilateral symmetrical
• Acoelomate
• Body have 3 layers of tissue with organs and organelles (tripoblastic)
• Unsegmented
• free living or parasitic
• Predatory if free living and absorptive if parasitic
• Have mouth and no anus
• Have osmoregulatory system
• Have simple nervous system with concentration of ganglia in anterior region
• Movement in some is controlled by longitudinal, circular and oblique layers of muscle
and others move along slime trails by the beating of epidermal cilia
• Live on land, both fresh and marine waters as well as inside other animals
• Reproduction mostly sexual as hermaphrodites and asexual by means of binary fission
Class Turbellaria
Free living Aquatic animals mainly marine Delicate, soft bodyOuter surface cover with cilia for locomotionHas one opening which function both as mouth and anus Sense organs available in adults Typically carnivorous Example : Planaria sp.
Class trematoda
Endoparasitic or ectoparasitic – may require intermediate host Leaf-like shapeUsually ventral sucker in addition to sucker on head for attachment to host Thick cuticle with spines for protectionNo cilia in adult as locomotion is not needed because not parasitic Has one opening both as mouth and anus Sense organs only in free living larval stages
Example : Fasciola sp.
Class cestoda
EndoparasiticElongated body divided into proglottids which are able to break off as eggs produced within proglottidsSuckers and hook on head for attachment to host Thick cuticle for protectionNo digestion required as they absorb nutrients from host Sense organ only in free living larval stages Example : Tania saginata
Phylum Porifera Cnidaria platyhelminthes
Body Cavity(Coleom)
Acoelomate Acoelomate Acoelomate
Body symetry Asymetry Radial Bilateral
Body plan (derm layer)
No diploblastic Tripboblastic
Segmentation No No No
Unique characteristic
Choanocytes Cnidocyte, gastrovascular cavity (incomplete digestive tract with a mout but no anus)
Dorsoventrally flattened, gastrovascular cavity