Question

1. what is the main organ of the nervous system? a) heart b) brain c) lung d) stomach 2. which system controls the removal of liquid waste from the body? a) circulatory b) digestive c) excretory d) reproductive word bank: digestive, circulatory, excretory, musculoskeletal, immune, nervous, reproductive, integumentary, system, tissues 1. the system allows the body to move and supports the bodys structure. 2. the system helps defend the body against disease.

Explanation:

For the first question:

• The nervous system's main organ is the brain. The heart is part of the circulatory system, the lung is part of the respiratory system, and the stomach is part of the digestive system.

For the second question:

• The excretory system is responsible for removing liquid waste from the body. The circulatory system circulates blood, the digestive system processes food, and the reproductive system is for reproduction.

For the word - bank fill - in:

1. The musculoskeletal system allows the body to move and supports the body's structure. Muscles are for movement and bones provide support.
2. The immune system helps defend the body against disease. It has cells like white blood cells that fight pathogens.

Answer:

1. b) Brain
2. c) Excretory
3. musculoskeletal
4. immune