Section 38.1 (Exam 3) Flashcards
Animals Are Composed of Organs Built from Four Types of Tissues
What are some things that animals have to do to survive?
Acquire energy and nutrients
Growth and development/build structure
Remove waste/toxins
Maintain constant internal environment (homeostasis)
Sense and respond; Reproduce
What are the main advantages of multicellularity?
Efficiency
Larger size
Specialization
How do small and large multicellular animals exchange materials?
Multicellular animal with only a few layers of cells- direct exchange with the environment, e.g., sponges.
Cells of larger animals must be served by an internal environment of extracellular fluid
Define tissues.
Groups of similar cells
What are the 4 types of tissues?
Epithelial
Muscle
Connective
Nervous
What is the function of epithelial tissue?
sheets of cells that create barrier and often have secretory function
What are the 4 types of epithelial tissue?
Stratified squamous epithelium
Cuboidal epithelium
Columnar epithelium
Secretory cells
What is the function of muscle tissue?
contracts to generate force and movement
What are the 3 types of muscle tissue?
Cardiac muscle
Smooth muscle
Skeletal muscle
What is the function of connective tissue?
provides structure and support
What are the 4 types of connective tissue?
Bones
Blood cells
Adipose tissue
Ligaments and tendons
What is the function of nervous tissue?
conveys and processes information
What are the 3 types of nervous tissue
Sensors
Neurons
Glia
Define organs.
Internal structures that carry out specific functions
How many of the 4 tissue types do most organs have?
All 4
