Transport in Living Things

Why do living things need a transport system?

• To move from one place to another
• To supply food and oxygen to their cells
• To communicate with other living things
• To produce energy for their activities

Which blood vessels carry oxygen-rich blood away from the heart?

• Capillaries
• Veins
• Arteries

What is the main function of capillaries in the human body?

• To carry blood away from the heart
• To carry blood towards the heart
• To exchange substances between blood and body cells

Which type of blood vessel returns oxygen-poor blood to the heart?

• Veins
• Arteries
• Capillaries

In plants, what does the xylem transport?

• Food from the leaves to other parts of the plant
• Water and mineral salts from the roots to other parts of the plant
• Oxygen from the leaves to other parts of the plant

Which tissue in plants transports food from the leaves to other parts of the plant?

• Xylem
• Phloem
• Capillaries

What is diffusion?

• The movement of substances from areas of high concentration to low concentration
• The movement of substances from areas of low concentration to high concentration
• The exchange of gases in the lungs

What process facilitates the absorption of water at the roots of plants?

• Diffusion
• Osmosis
• Photosynthesis

Which blood vessel collects blood from the upper body and returns it to the heart?

• Superior vena cava
• Inferior vena cava
• Pulmonary vein

Which blood vessel carries oxygen-poor blood from the heart to the lungs?

• Pulmonary artery
• Aorta
• Pulmonary vein