1 / 30

Organ systems in Humans

Organ systems in Humans. Chapter 3.3. This year we will look at 3 of the 11 organ systems found in humans; 1. Digestive system 2. Respiratory system 3. Circulatory system. Structures. BLM 3-12. Digestive system. Begins with mouth Salivary glands start breaking down starches.

nicole
Download Presentation

Organ systems in Humans

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Organ systems in Humans Chapter 3.3

  2. This year we will look at 3 of the 11 organ systems found in humans; • 1. Digestive system • 2. Respiratory system • 3. Circulatory system

  3. Structures

  4. BLM 3-12

  5. Digestive system • Begins with mouth • Salivary glands start breaking down starches. • Food travels through esophagus, stomach, small intestine, large intestine, rectum, anus • Others that assist: liver, pancreas and gallbladder. • http://www.youtube.com/watch?v=q3986Yfl5cU&feature=related

  6. BLM 3-13

  7. Respiratory system • Air enters through mouth/nose • Goes through esophagus • Continues with larynx, trachea, bronchus, bronchioles, and alveoli (alveolus) • http://www.youtube.com/watch?v=HiT621PrrO0&feature=related

  8. BLM 3-14

  9. Circulatory system • Two parts • A system of tubes that carry blood through body • A “pump”  Heart • Made of blood vessels: • Arteries • Veins • Capillaries

  10. The circulatory system: Video • http://www.youtube.com/watch?v=H04d3rJCLCE&feature=related

  11. Blood Vessels

  12. Page 81 Figure 3.17

  13. Arteries • Carries blood away from the heart to the rest of body • Walls are thick and muscular to avoid collapsing under pressure of pumping blood. • Usually depicted as red (full of oxygen)

  14. Veins • Carries blood back to the heart from the rest of body. • Blood moves slow now because of traveling through body • Walls are thin. • Have valves to stop blood from flowing backwards. • Usually depicted as blue (lacking oxygen)

  15. Capillaries • Connect arteries and veins • Hair thin vessels, walls only one cell thick

  16. Blood

  17. Functions

  18. 1. Digestive system • Breaks down food into small parts.

  19. 2. Respiratory system • Moves air in and out of the body. • The in and out movement of air supplies O2 for cells and removes waste CO2. ( gas exchange)

  20. 3. Circulatory system • Circulates blood around body • Delivers food, dissolved gasses, and other materials • Carries away waste.

  21. Connections between systems.

  22. Page 82 Figure 3.18 (A&B)

  23. Page 82 Figure 3.18 (A&B)

  24. Respiratory and Circulatory • These systems are the 2 main ways in which the needs of each cell are met. • The Resp. Sys. Brings O2 into body and removes CO2 and the Circ. Sys is the road it travels. • The alveoli and the capillaries are where the 2 sys. meet.

  25. Respiratory and Circulatory • The bronchioles of the lungs end in a grape-like cluster of the alveoli. • The purpose of the alveoli is to give a very large surface area for gas exchange to occur.

  26. Respiratory and Circulatory • The alveoli and the capillaries are both very thin walled because O2 and CO2 must diffuse through them. • We breathe in air. It travels to the alveoli. The capillaries wrap themselves around the alveoli and collect the diffused O2 and bring it to the rest of body. • The reverse happens when we breathe out.

  27. Page 84 Figure 3.19

  28. Digestive and Circulatory • Food transfers from Digest. Sys to Circ Sys. in the small intestine. It is lined with hair like things called villi. Each villushas a network of capillaries. • Dissolved food particles pass from the intestine into the capillaries by a process called absorption.

  29. Mechanics of breathing.

More Related