1. Integumentary System
Janice V. Ng, MSc
2nd SEM 2012-2013

2.  Protection
 Regulatory function
 Sensation
 Excretion
 Respiration

3.  Invertebrates
 Unicellular
 Protozoans
 Multicellular - epidermis
 Phylum Porifera
 Phylum Cnidaria
 Phylum Platyhelminthes
 Phylum Nematoda
 Phylum Annelida
 Phylum Arthropoda
 Phylum Echinodermata
 Vertebrates
 Multicellular
 Phylum Chordata
 Class Amphibia
 Class Mammalia

4. Protozoan
 Amoeba
 Cell membrane
 Paramecium
 Cell membrane
 Pellicle

5. Phylum Porifera
 Epidermis = Pinacoderm
 pinacocytes
 Choanocytes
 Mesoglea (mesohyl)
Grantia

6. Phylum Cnidaria
 Epidermis
 Cnidocytes
 Cnidocysts/nematocysts
 Mesoglea
 Gastrodermis
Hydra

7. Phylum Platyhelminthes (flatworm)
 Class Turbellaria
 Class Monogenea
 ClassTrematoda (flukes)
 Class Cestoda (tapeworms)

8. Class Turbellaria
 Ventrally ciliated epidermis
 Rhabdites
 Gland cells
Dugesia/ Planaria

9. Class Trematoda
 Epidermis  syncytial tegument
Fasciola

10. Phylum Nematoda (roundworm)
 Cuticle
 Epidermis/Hypodermis
 syncytial
 Muscle layer
 Longitudinal muscles
Ascaris

11. Phylum Annelida (segmented worm)
 Cuticle
 Epidermis
 Muscle layers
 Circular
 Longitudinal
Lumbricus

13. Phylum Arthropoda
 Cuticle (chitinized)
 Epidermis
 Molting/Ecdysis

14. Phylum Echinodermata
 Epidermis
 Spines
 Dermis with ossicles
Starfish (arm)

15. Class Amphibia
 Stratified epidermis
 Stratum corneum - contains keratin
 Stratum germinativum/mucosum/profundum/malphigii
 Glands: (extending into dermis) Mucous and Poison
glands
 Chromatophore
 Dermis - fibrous CT
 Stratum spongiosum
 Stratum compactum
 Subcutaneous layer
Frog

16. Class Mammalia
 Stratified Epidermis
 Glands: (extending into
dermis) Sweat and
Sebaceous glands
 Dermis
 Hypodermis (superficial
fascia)
L.S of human skin/scalp
C.S of human scalp