1. Chapter 25 “What is an Animal”

2. Chapter 25 Characteristics of Animals Eukaryotic Multi Cellular Have ways of moving – Help reproduce – Obtain food – Protect themselves Specialized cells for nerve and muscle tissue

3. Chapter 25 Characteristics of Animals (cont.) Cells do not have cell walls Most adults are fixed in size and shape – They do not continue to grow throughout their life

4. Chapter 25 Characteristics of Animals (cont.) Methods for Obtaining Food: All animals are heterotrophic (consume food) All animals depend on autotrophs (directly or indirectly) Some animals move from place to place and others remain stationary. – Organisms that stay stationary are known as sessile (SES ul)

5. Chapter 25 Characteristics of Animals (cont.) Animals Must Digest their Food: Heterotrophs must ingest their food, after ingestion they must digest. – Some animals digestion is carried out within cells, in other animals it takes place in an internal cavity – Some of the food consumed and digested is stored as fat or glycogen and is used when food is not available.

6. Chapter 25 Characteristics of Animals (cont.) Animal Cell Adaptations: Most animal cells are adapted to carry out different functions – Sense and seek out food – identify and protect themselves