When an egg cell is fertilized by a sperm cell, a __________ is created.
It is this cell from which all other cells in the body stem from, however all body cells are not identical. As cells begin to divide, they also begin to specialize to perform specific ___________________.
Stinging cells in a jellyfish help it ___________________________
Light emitting cells in a female firefly help it __________________
The ability to carry oxygen allows blood cells to bring ________
______________________
Specialized animal cells cannot exist on their own, but must exist as a part of a larger system. An entire collection of cells working together as a _________________that is capable of __________________
________________________________________.
Specialized cells exist in an organism in varying levels of organization to form a hierarchy with “More Complex” at the top and
“Less Complex” at the bottom.
The functioning of the whole organism depends on the hierarchy of organization within an animal. A human needs a ____________ system to deliver nutrients and oxygen to its entire body. This system requires a _______ that is made up of muscle and _______________ to pump blood through the _____________ and ____________.

TISSUES
Animals have four major types of tissue:
_________ tissue: a thin sheet of tightly packed cells that covers body surfaces and lines internal organs and body cavities.
______________________ tissue: a specialized tissue that provides support and protection for various parts of the body.
______________ tissue: A group of specialized tissues containing proteins that can contract and enable the body to move.
__________ tissue: Specialized tissue that conducts electrochemical signals from one part of the body to another.
Each of these types of tissue contains many types of specialized cells and each is found in most organ systems.
ORGANS
Each organ system is made up of highly specialized organs and other structures that work together to perform the overall function of the system. Most organs work within a single organ system, but some organs can work across _________________ organ systems.
ORGAN SYSTEMS
All animals accomplish the same basic function, regardless of their appearance, behaviour or where they live. They all obtain _________,
____________ and ____________ waste. They all ______ and _________ to their _____________, _____ and _______ damage, and reproduce. The task of _____________________ is to perform these basic functions.
Some main organ systems are the:
Digestive system
Circulatory system
Respiratory system
Musculoskeletal system
Nervous system

HOMEWORK:
1.
Give an example of an organ that is found in: a.
Only one organ system b.
More than one organ system
2.
Which organ systems may be associated with the following functions: a.
Movement b.
Eating c.
Sensing the environment d.
Breathing