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 organs
Eyelid reflex when something is coming towards your face very quickly; Pushing food through your digestive system
Involuntary
Lots of densely packed cells; Function: Makes some digestive enzymes and filters out toxic things from the blood
Liver Tissue
A change in the internal or external environment that causes the nervous system to react.
Stimulus
causes movement when muscles contract(shorten)
Muscular System
stomach, liver, intestines
Digestive System organs
Picking up your shoes; Walking; Smiling; Jumping up and down
Voluntary
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
A _____________ receptor is a sense receptor that detects and is activated by movement.
Mechanical
breaks down food into substances that can be absorbed and used for energy
Digestive System
Nose/Mouth, Windpipe (trachea), Lungs
Respiratory System organs
Breathing in and out and Blinking
Both Voluntary & Involuntary
Long, thin strips; Function: Holds on to bone and makes bones move
Skeletal Muscle Tissue
Receptors that detect and are activated by chemical substances are called ____________ receptors.
Chemical
circulates blood through the body
Circulatory System
muscles in legs, arms, heart
Muscular System organs
Writing or typing
voluntary
Lots of round holes; Function: Takes in oxygen from the air and releases carbon dioxide waste from the body
Lung Tissue
_________ receptors are sense receptors that detect and are activated by light.
Light
brings oxygen into the body and removes carbon dioxide waste
Respiratory System
bones such as leg and arm bones, ribs
Skeletal System
Sneezing or coughing
involuntary
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
Structure: Has lots of folds; Function: Absorbs nutrients from food that has been broken down
Small Intestine