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Animal Life Processes

Name: ________________________________ Date: ________________
Across
Animals cells exchange oxygen and carbon dioxide with their surroundings by ____ across the outer coverings or membranes of cells.
During incomplete metamorphosis, an insect goes directly from an egg to a ______, which looks like a young adult insect without wings.
Animals with a nerve _____ have no specialized neurons.
____ are nerve cell with a unique structure for receiving and passing on information.
In a _____ circulatory system, blood always stays inside vessels and the heart.
_____ are tiny, thin-walled blood vessels where blood and body cells exchange substances.
A signal that causes an animal to react in some way is a ______.
A _____ is a place where two or more parts of a skeleton meet.
_____ respiration is the process in which cells use oxygen and digested food molecules to release the energy in food.
Some animals go through a period of major body changes called ____.
Animals that eat only other animals are ______.
A _____ is an organized grouping of neurons in the head of an animal with bilateral symmetry.
______ neurons are nerve cells that carry response information to muscles and other organs.
A hawk's long broad feathers provide _____, enabling it to fly very high or soar.
In ______ reproduction, one parent produces a new organism identical to itself.
The larva stage of a frog is called a _____.
The length of time between fertilization and birth is called the _____ period.
Sponges reproduce asexually by ______, or having offspring grow out of and break off from a parent.
Materials are exchanged between the embryo and the mother through an organ called the _______.
A ____ is an immature form of an animal that looks different from the parent.
With insects that undergo complete metamorphosis an egg hatches into a ______.
Down
Muscular hind or back legs enable animals to push off a surface and _____.
______ neurons are nerve cells that detect stimuli.
The structures that an animal uses to exchange gases with its surrounding make up the ______ system.
The process that breaks down food into small molecules is called ______.
The form of a cnidarian that looks like an open umbrella is a _______.
Tissues that contract or relax to create movement are _______.
Most air breathing animals have _____, sac like structures made of a thin layer of cells where gases are exchanged.
Sea stars and other echinoderms have a water _____ system, a system of fluid filled tubes which produces suction from movement.
Most animals that live in water have ________, feather-like structures where gases are exchanged between water and blood.
A ______ system transports needed materials to cells and takes away waste.
Animals that eat both plant and other animals are ______.
Animals that eat only plant material are _____.
A ______ is an animals reactions to a stimulus.
Shark and some other fishes have endoskeletons made of ______, a tissue that is more flexible than bone.
The eggs of land vertebrates, such as reptiles and birds are called ______ eggs.
A form of a cnidarian that looks like an upright vase is a _____.
A ____ is the only mammal that flies.
To grow, arthropods must shed their exoskeletons periodically and produce new ones in a process called _____.
Animals that strain their food from the water are called ____ feeders.
A ____ becomes enclosed in a protective covering while its body undergoes significant changes.