39 Animal body systems often coordinate their actions to carry out specific functions for the whole animal. Which of these correctly describes the interaction of two biological systems for
a specific purpose in the human body?
Temperature Regulation
Nutrient Absorption
A
с
The nervous system The endocrine
secretes hormones system responds to
that cause smooth shivering by causing
and skeletal muscles sweat glands to
to contract.
produce sweat
The digestive
system transports
digested materials
to areas of the
body where they
are needed.
The circulatory
system breaks
down food into
usable materials
mechanically
and chemically
Infection Defense
Reproduction
B
D
As parts of the
integumentary
system, skin and
nostril hairs help
keep invading
pathogens out.
Within the immune
system, antibodies
are produced by
B lymphocytes to
defend against
invaders that enter.
The endocrine
system produces
sex hormones
(or pheromones)
for the animal.
The reproductive
system controls the
endocrine system
by regulating
hormone levels in
the bloodstream.