, 1. Which of the following is a function of the lymph
nodes? ANSWER Defend the body against pathogens
*because the lymph nodes contain
white blood cells, which defend the body when
pathogens enter.*
2. Which of the following systems works closely with
the circulatory system in order to oxygenate the
blood and remove carbon dioxide? ANSWER Respiratory
system
3. Which of the following molecules is used to send
signals throughout the body? ANSWER Hormones
*Hormones are used to send signals from one part
of the body to another.*
4. is the most probable
cause of walking pneumonia? ANSWER Mycoplasma infection
5. is the cause of the flu? ANSWER Influenza virus
6. What is the primary component of muscles? ANSWER protein
7. organs that produces sperm? ANSWER Testes
8. Which of the following connects the ovaries and
nodes? ANSWER Defend the body against pathogens
*because the lymph nodes contain
white blood cells, which defend the body when
pathogens enter.*
2. Which of the following systems works closely with
the circulatory system in order to oxygenate the
blood and remove carbon dioxide? ANSWER Respiratory
system
3. Which of the following molecules is used to send
signals throughout the body? ANSWER Hormones
*Hormones are used to send signals from one part
of the body to another.*
4. is the most probable
cause of walking pneumonia? ANSWER Mycoplasma infection
5. is the cause of the flu? ANSWER Influenza virus
6. What is the primary component of muscles? ANSWER protein
7. organs that produces sperm? ANSWER Testes
8. Which of the following connects the ovaries and
