Chapter 15 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

Diffusion is the movement of substances from a region of ___ concentration to a region of ___ concentration, ___ a concentration gradient.

• lower, higher, down

• higher, lower, down

• lower, higher, up

• higher, lower, up

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

• Diffusion
• Osmosis
• Photosynthesis

What does the human circulatory system consist of?

• lungs and heart
• heart, blood vessels & blood
• blood and veins
• bones, muscles and hair

Which blood vessel is shown in the middle of the image?

• artery
• vein
• capillary
• pulmonary