bodily systems - digestive, respiratory and circulatory

• What are body systems?

  Groups of organs that work together to perform specific functions.
• How many major systems does the human body have?

  11 major systems.
• Why are body systems considered interconnected?

  Because they depend on each other to function properly.
• What are the primary functions of the digestive, respiratory, and circulatory systems?

  - **Digestive system**: Breaks down food for energy and nutrients. - Respiratory system: Brings oxygen into the body and removes carbon dioxide. - Circulatory system: Transports oxygen, nutrients, and waste throughout the body.
• How do the digestive, respiratory, and circulatory systems work together?

  The digestive system provides nutrients, the respiratory system provides oxygen, and the circulatory system transports both to cells throughout the body.
• What is the primary function of the respiratory system?

  To bring oxygen into the body and remove carbon dioxide.
• What are the key components of the digestive system?

  The gastrointestinal tract and accessory organs.
• What are the key components of the digestive system and their functions?

  1. Mouth: Mechanical breakdown of food, start of chemical digestion. 2. Esophagus: Moves food to stomach via peristalsis. 3. Stomach: Further breakdown of food, production of gastric juices. 4. Small intestine: Main site of nutrient absorption. 5. Large intestine: Water absorption, formation of feces. 6. Accessory organs: Liver (produces bile), pancreas (produces digestive enzymes), gallbladder (stores bile).
• What is the main site of nutrient absorption in the digestive system?

  The small intestine.
• What are the key components of the respiratory system and their functions?

  1. **Nose and nasal cavity**: Filters, warms, and humidifies air. 2. Pharynx: Passageway for air and food. 3. Larynx: Contains vocal cords for speech. 4. Trachea: Airway to the lungs. 5. Bronchi and bronchioles: Branching airways within the lungs. 6. Alveoli: Tiny air sacs where gas exchange occurs. 7. Diaphragm: Muscle that facilitates breathing.
• Where does gas exchange occur in the respiratory system?

  In the alveoli.
• What is the primary function of the circulatory system?

  To transport oxygen, nutrients, hormones, and waste products throughout the body.
• What are the key components of the circulatory system and their functions?

  1. **Heart**: Pumps blood. 2. Blood vessels: - Arteries: Carry blood away from the heart. - Veins: Return blood to the heart. - Capillaries: Allow exchange of substances between blood and tissues. 3. Blood: Fluid consisting of plasma, red blood cells, white blood cells, and platelets.
• What is the cardiac cycle?

  The sequence of diastole (relaxation and filling) and systole (contraction and pumping) of the heart chambers.
• What are the two main circuits of the circulatory system?

  Pulmonary circulation and systemic circulation.
• How do the digestive, respiratory, and circulatory systems interact?

  - Digestive-Circulatory: Nutrients absorbed by the digestive system are transported by the circulatory system. - Respiratory-Circulatory: Oxygen from the lungs is carried by red blood cells; carbon dioxide is transported to the lungs for exhalation. - Digestive-Respiratory: Both systems use muscular contractions; diaphragm movement affects both. - All three systems: Work together to provide energy to cells and maintain homeostasis.
• How does the circulatory system support both the digestive and respiratory systems?

  It transports nutrients from the digestive system and oxygen from the respiratory system to body tissues.