Integumentary System

Janice V. Ng, MSc

2nd SEM 2012-2013

Protection

Regulatory function

Sensation

Excretion

Respiration

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

Protozoan

Amoeba

Cell membrane

Paramecium

Cell membrane

Pellicle

Phylum Porifera

Epidermis = Pinacoderm

pinacocytes

Choanocytes

Mesoglea (mesohyl)

Grantia

Phylum Cnidaria

Epidermis

Cnidocytes

Cnidocysts/nematocysts

Mesoglea

Gastrodermis

Hydra

Phylum Platyhelminthes (flatworm)

Class Turbellaria

Class Monogenea

Class Trematoda (flukes)

Class Cestoda (tapeworms)

Class Turbellaria

Ventrally ciliated epidermis

Rhabdites

Gland cells

Dugesia/ Planaria

Class Trematoda

Epidermis syncytial tegument

Fasciola

Phylum Nematoda (roundworm)

Cuticle

Epidermis/Hypodermis

syncytial

Muscle layer

Longitudinal muscles

Ascaris

Phylum Annelida (segmented worm)

Cuticle

Epidermis

Muscle layers

Circular

Longitudinal

Lumbricus

Phylum Arthropoda

Cuticle (chitinized)

Epidermis

Molting/Ecdysis

Phylum Echinodermata

Epidermis

Spines

Dermis with ossicles

Starfish (arm)

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

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