body systems
supports an organism's body, protects its internal structures, and allows the body to move
Skeletal System
brain, spinal cord, nerves
Nervous System(O)
A change in the internal or external environment that causes the nervous system to react.
Stimulus
Structure: Lots of densely packed cells; Function: Makes some digestive enzymes and filters out toxic things from the blood
Liver Tissue
Structure: Secrets acid and squeezes to help break down food; Function: Absorbs nutrients from food that has been broken down
Stomach Tissue
causes movement when muscles contract(shorten)
Muscular System
stomach, liver, intestines
Digestive System(O)
Eyelid reflex when something is coming towards your face very quickly; Pushing food through your digestive system;
Involuntary
Structure: Individual round cells that are not connected to one another; Function: Takes in oxygen from the air and releases carbon dioxide waste from the body
Blood
collects and responds to information from inside and outside of the body, sends instructions to the rest of the body about what to do
Nervous System
breaks down food into substances that can be absorbed and used for energy
Digestive System
Nose/Mouth, Windpipe (trachea), Lungs
Respiratory System(O)
Picking up your shoes; Walking; Smiling; Jumping up and down
Voluntary
Structure: Long, thin strips; Function: Holds on to bone and makes bones move
Skeletal Muscle Tissue
heart, blood vessels
Circulatory System(O)
circulates blood through the body
Circulatory System
muscles in legs, arms, heart
Muscular System(O)
Breathing in and out; Blinking;
Both Voluntary & Involuntary
Structure: Lots of round holes; Function: Takes in oxygen from the air and releases carbon dioxide waste from the body
Lung Tissue
Receptors that detect and are activated by chemical substances are called ____________ receptors.
Chemical
brings oxygen into the body and removes carbon dioxide waste
Respiratory System
bones such as leg and arm bones, ribs
Skeletal System(O)
A _____________ receptor is a sense receptor that detects and is activated by movement.
Mechanical
Structure: Circles of cells spaced far apart, but touching each other; Function: Strong but lightweight support for the weight and structure of the body
Bone Tissue
_________ receptors are sense receptors that detect and are activated by light.
Light