What structure in the leaf is the entry point of gases in plants?

• Guard cells

• Mesophyll

• Palisade

• Stomata

What is transported by the xylem vessels in the vascular bundle?

• food

• glucose

• starch

• water

What is the purpose of the coronary arteries in the circulatory system?

• To regulate blood pressure in the heart

• To carry oxygen-rich blood to the heart

• To carry deoxygenated blood away from the heart

• To supply the heart muscle with oxygen and nutrients

What structures are responsible for gas exchange in mammalian lungs?

• Alveoli

• Bronchioles

• Spiracles

• Tracheae

In pulmonary circulation, what organs does exchange of gases happens?

• heart and the lungs.

• lungs and the kidneys.

• heart and the kidneys.

• heart and the body parts.

Which of the following components is NOT found in blood?

• Antibodies

• Neurons

• Plasma

• Platelets

Which of the following is NOT a function of the respiratory system?

• Cellular respiration

• Muscle contraction

• Odor detection

• Voice generation

What type of blood vessel carries blood away from the heart?

• Arteries

• Capillaries

• Veins

• Venules

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

• Transportation of oxygen

• Transportation of nutrients

• Defense against pathogens

• Formation of blood clots

Which of the following is NOT a function of the circulatory system?

• Gas exchange

• Digestion of food

• Regulation of body temperature

• Transport of hormones