Explanation:
The autonomic nervous system regulates peripheral blood flow and sweat glands.
Nerves control muscles connected to hair follicles.
The integumentary system reduces water loss, contains receptors that respond to touch, regulates body temperature, and protects the inside of the body from damage.
In the alarm reaction stage
There are three sources of genetic variation: mutation, gene flow, and sexual reproduction. A mutation is simply a change in the DNA.
Answer:
Through their lungs.
Explanation:
They need lungs to take in oxygen and oxygen is vital for survival.
