Organisation

• What is meant by a tissue?

  A tissue is a group of cells with a similar structure and function.
• What is an organ?

  An organ is a group of tissues working together for a specific function.
• What is an organ system?

  An organ system is a group of organs that work together to form organisms.
• What are the main organs in the digestive system?

  The main organs in the digestive system include the mouth, esophagus, stomach, small intestine, and large intestine.
• What are the three main nutrients found in food?

  The three main nutrients are carbohydrates, proteins, and lipids (fats).
• Why must large food molecules be digested?

  Large food molecules must be digested because they are too large to be absorbed into the bloodstream.
• What role do enzymes play in digestion?

  Enzymes break down large food molecules into smaller molecules during digestion.
• What happens to food in the mouth during digestion?

  Food is chewed, and enzymes in saliva begin to digest starch into smaller sugar molecules.
• What is the function of hydrochloric acid in the stomach?

  Hydrochloric acid helps enzymes to digest proteins in the stomach.
• What is the role of the pancreas in digestion?

  The pancreas releases enzymes that continue the digestion of starch, protein, and lipids.
• What does bile do in the digestive system?

  Bile speeds up the digestion of lipids and neutralizes the acid from the stomach.
• How are small food molecules absorbed in the small intestine?

  Small food molecules are absorbed into the bloodstream by diffusion or active transport.
• What happens in the large intestine during digestion?

  Water is absorbed into the bloodstream in the large intestine.
• What is the final product released from the body after digestion?

  The final product released from the body is feces.
• How does the body use the products of digestion?

  The products of digestion are used by the body to build new carbohydrates, lipids, and proteins.
• What is one use of glucose produced during digestion?

  Some of the glucose produced is used in respiration.
• What are the main functions of the organs in the digestive system?

  • Mouth: Chewing food and beginning starch digestion
  • Esophagus: Transporting food to the stomach
  • Stomach: Digestion of proteins and mixing food
  • Small intestine: Digestion of starch, protein, and lipids; absorption of nutrients
  • Large intestine: Absorption of water; formation of feces
• What is the primary function of the human heart?

  To pump blood around the body
• What type of circulatory system does the human heart operate in?

  A double circulatory system
• Which ventricle pumps blood to the lungs?

  The right ventricle
• What occurs in the lungs during blood circulation?

  Gas exchange takes place
• Which ventricle pumps blood around the rest of the body?

  The left ventricle
• What are the main blood vessels associated with the heart?

  Aorta, vena cava, pulmonary artery, pulmonary vein, and coronary arteries
• What structures in the lungs are important for gas exchange?

  Trachea, bronchi, alveoli, and capillary network
• Where is the pacemaker located in the heart?

  In the right atrium
• What is the function of an artificial pacemaker?

  To correct irregularities in the heart rate
• How many different types of blood vessels are there in the body?

  Three
• What are the three types of blood vessels in the body?

  • Arteries
  • Veins
  • Capillaries
• Capillaries


  ont>Capillaries</front>

  <back/tiny vessels where oxygen and nutrients are exchanged with cells
• Arteries


  Carry oxygenated blood away from the heart
• Myocardium


  Thick middle layer of heart muscle
• Coronary Heart Disease

  A condition where the coronary arteries narrow or block, reducing blood flow to the heart muscle
• Lifestyle Changes


  Low risk, allows personal empowerment, low cost, but may have limited scope and requires commitment
• Mechanical Devices


  Can be effective for severe cases, durable, but may be invasive and expensive
• Drugs


  Can be taken at home, cost-effective, but may have limited effectiveness and side effects
• What is the primary function of the heart?

  To pump blood around the body
• What type of circulatory system does the human heart operate in?

  A double circulatory system
• Which ventricle pumps blood to the lungs?

  The right ventricle
• What occurs in the lungs during blood circulation?

  Gas exchange takes place
• Which ventricle pumps blood around the rest of the body?

  The left ventricle