Human Anatomy

Which of the following structures is primarily responsible for gas exchange in the respiratory system?

• Trachea

• Bronchi

• Aveoli

• Larynx

What are the main functions of the cardiovascular system?

• Digestion and nutrient absorption

• Oxygen and nutrient transport, waste removal

• Hormone production and immune defense

• Muscle contraction and nerve impulse transmission

Describe the flow of blood through the heart, starting from the right atrium.

• Right atrium → Right ventricle → Pulmonary veins → Lungs

• Right atrium → Right ventricle → Pulmonary arteries → Lungs

• Right atrium → Left ventricle → Aorta → Body

• Right atrium → Left atrium → Aorta → Lungs

What is the primary role of red blood cells in the cardiovascular system?

• Clotting blood

• Transporting oxygen and carbon dioxide

• Fighting infections

• Producing hormones

How does gas exchange occur in the alveoli?

• Through active transport

• By osmosis

• By diffusion

• Through the circulatory system

What is the primary function of the small intestine in digestion?

• Storing waste

• Absorbing nutrients

• Producing digestive enzymes

• Breaking down food mechanically

Which organ produces bile, and what is its role in digestion?

• Pancreas; it digests carbohydrates

• Stomach; it digests proteins

• Liver; it emulsifies fats

• Small intestine; it absorbs nutrients