How do the circulatory system and immune system work together to respond to an injury? *
100 points
Increased blood flow carries white blood cells to the site of the injury.
Increased blood flow kills healthy cells which prevents infection at the site of the
injury
Increased blood flow removes infected cells from the body at the site of the injury.
Increased blood flow allows for an increase in the exchange of 02 and CO2 at the site
of the injury.

In this case, the statement that people who exercise for an hour may have lower cholesterol levels is .

In this experiment, the was intentionally manipulated. it is the independent variable. the dependent variables that were measured were the

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.