Presentation on theme: "UNIT 15: ANIMAL KINGDOM. What characteristics are common to all animals? Eukaryotic cells NO cell wall Multicellular Cell specialization Heterotrophic."— Presentation transcript:
Animals are heterotrophs: Meaning they must get their nutrient from other organism.
Types of Feeders Type of FeederDescription HerbivoreFeeds on plants. CarnivoreFeeds on other animals. Filter feederAquatic; strain tiny floating organisms from the water. DetritivoresFeeds on decaying plant and animal material.
All About Animals What does an animal do when it respires? They take in oxygen and give off carbon dioxide. What does the excretory system of most animals do? Helps maintain homeostasis by eliminating ammonia quickly or converts it into a less toxic substance that is removed from the body. Animals respond to events in their environment using specialized cells called nerve cells.
Motile: ability to move. What enables motile animals to move around? Muscular contractions, usually in combination with support of the skeletal system. Sessile: Does not Move Why do sessile animals need musculature? Muscles help sedentary animals feed and pump water and fluids through their bodies.
What type of reproduction maintains genetic diversity in populations? Sexual Reproduction How? by improving species’ ability to evolve when the environment changes therefore increasing their chance of survival. What does asexual reproduction allow an animal to do? It allows animals to increase their numbers rapidly therefore increasing their chance of survival.
Early Development of Animals What is another name for a fertilized egg? Zygote What does a zygote form after it undergoes a series of divisions? Blastula Protostome: development of an animal from mouth to tail. Deuterostome: development of an animal from tail to mouth.
So… how do humans develop, huh??? Sperm fertilizes an egg zygote. Zygote undergoes cleavage. Mitotic cell division and cytokinesis, but NO cell growth
Development Zygote Cleavage Blastula (hollow space inside = Blastocoel)
Germ Layer Location Develops into Endoderm Innermost layer Digestive System MesodermMiddle layer Muscular System Ectoderm Outermost layer Nervous System 3 Germ Layers (Triploblastic)
Body Symmetry Radial Symmetry: body parts repeat around center. Examples: starfish, sand dollar, sea anemone Ex: Sea Anemone
Body Symmetry Bilateral Symmetry A single plane divides that body into two equal halves. Example; humans, dogs, cats Which one has cephalization? THIS GUY!!! Cephalization is the concentration of sense organs and nerve cells at the anterior end of the body Ex: Lobster
Animal Symmetry Bilaterally symmetrical animals have: Dorsal (top) side and Ventral (bottom) side. Right and Left side. Anterior (head) and Posterior (tail) ends. Cephalization: the development of a head.
Coelom: fluid-filled body cavity lined with mesoderm. You will hear words like… Acoelomate: lacking a body cavity. Pseudocoelomate: a false body cavity. Coelomate: true body cavity.