Human Digestive and Respiratory Systems

The video covers animal nutrition, focusing on energy sources, major nutrients, and the digestive system. It explains the roles of carbohydrates, proteins, vitamins, and minerals. The digestive process is detailed, highlighting the stomach and small intestine's roles in breaking down food and absorbing nutrients. The video also covers respiration, detailing the lung structure and the role of hemoglobin in oxygen transport.

Which of the following is NOT considered a major nutrient for animals?

• Water

• Proteins

• Vitamins

• Carbohydrates

What is the primary function of the stomach in the digestive process?

• Breaking down food with enzymes and acids

• Production of bile

• Elimination of waste

• Absorption of nutrients

Which part of the digestive system is primarily responsible for nutrient absorption?

• Large intestine

• Small intestine

• Stomach

• Esophagus

What is the role of villi in the small intestine?

• Secreting digestive enzymes

• Increasing surface area for absorption

• Producing bile

• Neutralizing stomach acids

Which of the following is broken down into amino acids in the small intestine?

• Fats

• Nucleic acids

• Proteins

• Carbohydrates

What is the primary function of the alveoli in the lungs?

• Exchanging gases between air and blood

• Producing mucus

• Filtering out dust and particles

• Transporting oxygen in the blood

What is the main component of hemoglobin that binds to oxygen?

• Iron

• Potassium

• Calcium

• Sodium

Which structure in the respiratory system is responsible for the majority of gas exchange?

• Bronchi

• Trachea

• Alveoli

• Diaphragm

How is breathing controlled in the body?

• Manually by the diaphragm

• Automatically by centers in the brain

• Through conscious effort

• By the heart rate

What happens to the ribcage during inhalation?

• It enlarges

• It remains the same

• It contracts

• It shrinks