Planarians have an incomplete digestive tract, one entrance surving as the mouth and anus.
nutrients are absorbed in the digestive system
Types of connective tissue would include all of these except blood. This is not a type of connective tissue like bone and muscle.
Fingers and toes are composed of bones, muscles, blood vessels, nerves, skin, and nails.
Bone-bone, bone-muscle, or muscle-muscle
The strength of gravity decreases as the SQUARE of the distance between the two objects (in this case, Earth and person). That means the pull will get weaker VERY quickly as you travel further and further away from the Earth, until it dwindles to almost nothing.
Astronauts in space are far enough away from the Earth (or any other massive bodies) that they feel almost no gravitational pull. That is why they 'float' around.
magnetic feilds are produced only when current is flowing
internal and sexual
The Fujita scale determines the strength of the tornado based on the severity of the damage it causes. In the U.S. it has been replaced by the Enhanced Fujita scale.
_______ is a fibrous protein molecule