S2 Biology - Body Systems

What is the main characteristic of multicellular organisms?

• They consist of many cells

• They consist of only one cell

• They are always microscopic

• They can only perform a few functions

What is the function of the respiratory system?

• To circulate blood

• To transport oxygen into the body

• To digest food

• To produce hormones

What is the primary function of the digestive system?

• To pump blood

• To break down food into nutrients

• To circulate oxygen

• To regulate body temperature

Which organ system is responsible for transporting oxygen around the body?

• Digestive system

• Circulatory system

• Nervous system

• Respiratory system

Which of the following is the main organ of the circulatory system?

• Heart

• Brain

• Lungs

• Kidneys

What is the role of the small intestine in digestion?

• To store food

• To absorb nutrients

• To produce digestive enzymes

• To pump blood

What is the purpose of the skeletal system in humans?

• To circulate blood

• To provide structure and support

• To carry oxygen to tissues

• To regulate body temperature

What is the purpose of red blood cells in the circulatory system?

• To fight infection

• To carry oxygen

• To fight cancer

• To produce energy

How do the digestive and circulatory systems work together?

How do multicellular organisms differ from unicellular organisms?

• Multicellular organisms have many cells with specialized functions

• Unicellular organisms have more complex systems

• Multicellular organisms are smaller

• Unicellular organisms can only reproduce by mitosis