ENRICHMENT DAY!

We are starting our new unit today – ANIMALS

Get out a sheet of paper ready for warm-up!

WARM-UP3-19-2015

List all the body systems you can think of.

List any of the organs you can that make up each of the systems you listed above.

Do any of these systems work together? If so, which ones?

INTRO TO THE ANIMAL KINGDOM

What is an Animal?

Characteristics of All Animals

1. Animals are Multicellular

2. Animals are Eukaryotic

3. Animals are Heterotrophs

Evolutionary/Developmental Milestones in Animals

1. Cell specialization and levels of

organization

2. Development of body symmetry and

segmentation

3. Development of an internal body cavity

and tissue layers

Cell SpecializationCells throughout a multicellular organism can

develop in different ways to perform different tasks.

Levels of Organization

Body Symmetry

Radial Symmetry:A body plan in which all body parts of an organism are arranged around a central point

Bilateral Symmetry:a single plane divides the body into two mirror images

Asymmetry:cannot be divided into mirror images

Symmetry in biology is the balanced distribution of duplicate body parts or shapes. The body plans of most multicellular organisms exhibit some form of symmetry…

Body Segmentation

Segmentation of the body allows development of various specialized limbs, such as antennae, pincers, walking legs, claws, wings, etc.

Cephalization is the concentration of nervous tissues in one location which eventually produces a head region with sensory organs and a brain.

Tissue Layers & Body Cavity

A body cavity, called a coelom, increases the efficiency of food intake and waste removal.

Tissue Layer Develops Into

Endoderm digestion and respiration structures

Mesoderm muscles, bones, blood, skin, reproductive organs

Ectoderm skin, brain, nervous system

The Animal Kingdom is divided into two main groups…

Invertebrates & Vertebrates

Porifera

Invertebrates

Over 95% of all animal species are invertebrates

There are 8 major phyla of invertebrates from the simplest to the most complex…

InvertebratesPORIFERA (Sponges) CNIDARIAN

Sea Anemone Jellyfish

PLATYHELMINTHES (Flatworms)

NEMATODA(Round Worms)

Planaria Tapeworm Pinworm Hookworm

InvertebratesANNELIDA MOLLUSCA

Earthworm Leech Squid, Snails, Clams, etc.

ARTHROPODA ECHINODERMATA

Crustaceans Spiders Insects Starfish Sea Cucumber Sand Dollar

ANIMAL BODY SYSTEMSBody systems are all interrelated and work together to perform their functions in animals. Body systems can be organized and studies by these functions:

REGULATION: Excretory & Nervous Systems

NUTRIENT ABSORPTION: Respiration, Digestion, & Circulatory Systems

DEFENSE: Immune, Integumentary, Lymphatic, Skeletal, & Muscular Systems

REPRODUCTION: Reproductive & Endocrine Systems

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