The Hierarchy of Structure in Animals (Unit Test)

Specialized Cells

Cells that cannot survive on their own and work as part of a larger group in the body.

Organs

Structures composed of different types of tissues working together to perform a complex body function.

Organ Systems

Systems containing one or more organs that work together to perform vital body functions.

Cell

The simplest/basic unit of life.

Tissues

A collection of similar cells that perform a particular, but limited function.

Epithelial Tissue

Thin sheets of packed cells covering surfaces and lining internal organs, providing protection from dehydration.

Connective Tissue

Tissues consisting of various types of cells and fibers held together by a matrix, providing support and insulation.

Muscle Tissue

Bundles of long cells (muscle fibers) that contain specialized proteins for movement.

Nerve Tissue

Long, thin cells capable of conducting electrical impulses for sensory and communication functions.

Function of Organs

To perform complex body functions using various tissue types.

Examples of Organs

Stomach, small and large intestines, liver, pancreas.

Functions of Organ Systems

To obtain oxygen and nutrients, eliminate wastes, sense, grow, repair and reproduce.

Examples of Specialized Cells

Muscle cells, bone cells, blood cells, sensory cells.

Protective Function of Epithelial Tissue

Prevents dehydration.

Examples of Connective Tissue

Bones, tendons, blood.

Components of Muscle Tissue

Long muscle fibers capable of shortening and contraction.

Types of Cells in Nerve Tissue

Cells capable of conducting electrical impulses and coordinating body functions.

Basic Functions of Organ Systems

To facilitate oxygen and nutrient intake, waste elimination, and respond to the environment.

Role of Connective Tissue

Provides support and insulation to various organs.

Long cells in Nerve Tissue

Cells that possess branches for effective communication within the body.