Gen Bio 2- Week 3 Q4

• Path of blood in the human circulatory system Right Atrium-Right Ventricle-Lungs-Left rium-Left Ventricle
• Pulmonary circulation


  Blood flows between the heart and the lungs to become oxygenated
• Systemic circulation


  Blood is distributed to the tissues and other systems of the body
• Simple organisms


  • Have a two-cell layer covering, get their supply of gases and excrete wastes through DIFFUSION
• Simple organisms


  • Hydra
  • Jellyfish
• Heart


  A muscle that is about the size of a fist (in humans); pumps blood throughout the body
• Blood cells


  • Erythrocytes (RBCs)
  • Leukocytes (WBCs)
  • Thrombocytes (Platelets)
• Erythrocytes (RBCs)


  Remove waste and deliver oxygen
• Leukocytes (WBCs)


  Help to defend the body against infection
• Thrombocytes (Platelets)


  Form a clot and prevent bleeding
• Capillary


  A tiny one-cell thick vessel that connects the arteries and veins together. It carries blood and nutrients inside the tissues and organs
• Chambers of the heart

  • Right Atrium
  • Left Atrium
  • Left Ventricle
  • Right Ventricle
• How blood gets filtered


  Blood gets filtered inside the blood capillaries found in the kidneys. Useful substances will be absorbed back by the blood while wastes will be removed in the form of urine
• Artery


  A thick and elastic red-colored muscular wall that carries blood away from the heart
• Vein


  A thinner blue-colored muscular walls that returns blood back to the heart
• Valves of the heart

  • Pulmonary Valve
  • Aortic Valve
  • Tricuspid Valve
  • Mitral Valve
• Open circulatory system


  The blood flows freely through cavities since there are no vessels to conduct the blood
• Closed circulatory system


  The blood flows through the arteries and veins connected together by capillaries
• Parts of the animal circulatory system

  • Aorta
  • Pulmonary artery
  • Carotid artery
  • Superior vena cava
  • Inferior vena cava
  • Pulmonary vein
• Vascular system of plants


  1. Roots absorb water and minerals from soil

  2. Water and minerals go to the stem

  3. Water and minerals enter the leaf and flower for photosynthesis

  4. Sugar, starch and other nutrients are produced during photosynthesis

  5. Sugar, starch and other nutrients go to the different parts of the plant

  6. Sugar, starch and other nutrients go to the stem

  7. Sugar, starch and other nutrients go back to the roots
• Xylem


  Carries water and minerals upward, from the root to its different parts
• Phloem


  Moves water and nutrients throughout the different parts of the plant