Muscles Skeleton
tissues that contract or relax to create movement.
Muscles
a signal that causes organisms to react in some way.
Stimuli
an animal moves about when what three systems work together to make movement happen?
Skeletal, Muscular, Nervous
External hard structure on some animals
A framework that shapes and supports an animal, protects its internal organs, and allows it to move in its environment.
Skeleton
a place where two or more parts of a skeleton meet.
Joint
an organisms response to a stimulus
Reaction
animals that live in water, on land, or in the air have different ________________ for movement
adaptations
Skeletons made up of fluid filled cavities surrounded by muscle
Skeletons without hard parts
allows animals to detect signals in their environment, process the signals and react to them
Nervous system
internal skeletons are also called
Endoskeletons
Nerve cells that pass information between neurons
Interneurons
an internal, gas – filled sac by adjusting the gas level, a fish can stay at a certain depth without using much energy
What is a swimbladder?
the electrical message that travels across a nerve cell
Impulse
a nerve cell with a unique structure for receiving and passing on information
Neuron
a tissue that is more flexible than bone
Cartilage
Nerve cells that are found in eyes ears nose and throughout the body
Sensory Neurons
A system of fluid filled tubes that produce suction which enables sea stars and other echinoderms to grip surfaces and move along
Water vascular system
what are the three types of skeletons?
Skeletons without hard parts,Exoskeletons, Endo skeletons
What are the three types of neurons
Sensory, Inter, Motor
The way the parts are held together in a joint determines how the joint can ________________
Move
The most complex nervous systems have a ___________________ and a ______________.
Nervous Cord and a brain
Animals move to ___________, _______ and __________ themselves, maintain homeostasis and to find __________
obtain food, defend, protect, mates
The simplest nervous systems are a _____________ arrangement throughout the body
netlike
an organized grouping of neurons in the head of an animal with bilateral symmetry
Brain