Completed 0 of 10 questions.
Your skin is part of ____.
Which of the following plays a role in the body's response to external stimuli?
How are humans and earthworms different in sexes?
Which system functions to move the skeletal members?
What are some of the types of muscle tissue?
Which system sends chemical messages throughout the body?
Which of the following's system is more similiar to humans/mammals?
Many organisms carry out the same functions using different methods.
The _____ system removes excess salts and other wastes from the blood
A human has a four chambered heart while most fish have...