Presentation Transcript

1. Video Questionsyep write down the whole sentence please So what does Bill Nye say about our heart…hope you are listening The Lub is the ____ push, and the Dub is _________ push Blood vessels near the heart are _____ like _______. A capillary is like a ________, while cells are like ________. Our blood brings nutrients and ______ to every cell
2. The following video describes how your blood works
3. Ch. 17

   Blood and Circulation

4. Circulate? So what is the circulatory system? Circulate - to move continuously or freely through a closed system or area The heart/bloodstream supply cells with the nutrients and oxygen they need to stay alive, in what is called the circulatory system
5. So does blood just go everywhere inside our bodies? No… Humans and other animals have closed circulatory systems, meaning that the blood is contained within a system of vessels. These are called blood vessels, as they provide a closed network of blood to our body
6. What are the 3 types of blood vessels called? As blood flows through the circulatory system, it moves through three types of blood vessels: arteries capillaries veins
7. The biggest blood vessel… Large vessels that carry blood AWAY from the heart to the tissues of the body are called arteries. Almost all arteries carry oxygen-rich blood. Arteries have thick walls. The biggest artery in our body is the AORTA
8. The smallest blood vessel… The smallest of the blood vessels are the capillaries. Their walls are only one cell thick, and most are narrow. The capillaries bring nutrients and oxygen to the tissues and help remove carbon dioxide and other waste.
9. Back to the heart… Blood vessels that carry blood backTOWARD the heart are veins. Veins have thinner walls than arteries. The walls of veins contain connective tissue and smooth muscle. The biggest vein in our body is the VENA CAVA “VenAca”
10. Picture time…The LAX Airport Body Heart Oxygen Red Blood Cells Arteries/Veins Blood Vessels (Arteriole) Capillaries The Cell
11. Your body is a city. And the airportis your heart. Airplanes bring in passengersjust as your lungs bring in molecules such as oxygen. Once arriving at the airport, taxi cabs(red blood cells) pick up passengers at the baggage claim area and drive them to where they want to go in the city. The arteries/veins act as theroads. These carry many red blood cells throughout the body. The biggest of these arteries is the aorta, which is like 110 South. The exits/streets are known asarterioles,as they are smaller transport systems. Finally, the passengers arrive at the drivewayof their homes (capillaries) where they are dropped off. The houseis the cell, and oxygen is dropped off in order for the body to function. The taxi cabs then pick up passengers who will leave the city(carbon dioxide), and they go right back to the airport by venules, and the vena cava.
12. Now, I want you to fill in the blank diagram… Body - Heart - Oxygen - Red Blood Cells - Arteries (Aorta) – Veins (Vena Cava) - Blood Vessels (Arteriole) - Capillaries - The Cell - Carbon Dioxide -
13. So what color is our blood?
14. So what color is our blood? Blue ? Red ? Both ? Write down what color you think your blood is, and explain why you think that…
15. Blue blood? Answer: So its really only dark red (no oxygen present) or bright red (with oxygen present) NOT BLUE!!!! EVER.. Our skins just bends light to make it look blue… Pretty cool huh?
16. Okay… So we know the color but… But what the heck is blood?!?
17. Figure 37-7 Blood Section 37-2 Plasma Platelets White blood cells Red blood cells Whole Blood Sample Sample Placed in Centrifuge Blood Sample That Has Been Centrifuged
18. Figure 37-7 Blood Section 37-2 Plasma Platelets White blood cells Red blood cells Whole Blood Sample Sample Placed in Centrifuge Blood Sample That Has Been Centrifuged
19. Blood Composition Section 37-2 Plasma Platelets White blood cells Red blood cells Whole Blood Sample Sample Placed in Centrifuge Blood Sample That Has Been Centrifuged
20. So what is plasma then? Plasma makes up about 55% of the total blood volume It is mostly water (90% by volume) But also contains dissolved proteins, glucose, blood clotting factors, minerals, hormones and carbon dioxide (about 10%)
21. How about Red Blood Cells? Red blood cells are also called erythrocytes (Eh-Rith-roh-sites) They transport oxygen They get their red color from hemoglobin This is an iron containing protein that binds to oxygen in the lungs RBC’s are made in the bone marrow (space inside our bones) and the liver
22. How does Oxygen get into cells? So RBC’s carry oxygen… What are the smallest blood vessels called where blood is delivered to cells? Capillaries!  Are the capillaries thick or thin? Thin!  RBC’s travel in a single file line Through diffusion (the movement of stuff)  oxygen enters a cell…
23. Physiology – Week 1

    The Respiratory System

24. What is respiration? To respire means to breathe (in O2, out CO2) Therefore THE RESPIRATORY SYSTEM deals with the act of breathing Or the exchanging of oxygen and carbon dioxide The main organs of the respiratory system are: The lungs!!! Duh…
25. Flowchart Respiration…steps Movement of Oxygen and Carbon Dioxide In and Out of the Respiratory System Pharynx (throat) Larynx (Voice Box) Oxygen from the air Mouth/Nose Trachea (windpipe) Oxygen and carbon dioxide exchange at alveoli Bronchioles Alveoli Bronchi
26. Figure 37-14 The Respiratory System Section 37-3 Pharynx Larynx Nose Trachea Mouth Lung Bronchiole Bronchus Epiglottis Alveoli Bronchioles Diaphragm Capillaries Edge of pleural membrane
27. Gas exchange… Alveoli: tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place. Alveoli Bronchiole DRAW THIS… Capillary
28. Figure 37-16 The Mechanics of Breathing The act of breathing… Section 37-3 Air exhaled Air inhaled Rib cage descends Rib cage rises Diaphragm Diaphragm Inhalation Exhalation
29. Figure 37-16 The Mechanics of Breathing The act of breathing… Section 37-3 Air exhaled Air inhaled Rib cage descends Rib cage rises Diaphragm Diaphragm Inhalation Exhalation
30. Intro To The Nervous System If you think of the brain as a central computer that controls all the functions of your body, then the NERVOUS SYSTEM is like a network that relays messages back and forth from it to different parts of the body. It does this via the spinal cord, which runs from the brain down through the back and contains threadlike nerves that branch out to every organ and body part.
31. Brain and Senses Your brain .... Controls your body. Receives messages from your eyes, ears, tongue, nose, and skin Your spinal cord… Reflexes are quick responses that cause your body to react before the brain gets involved Receives messages from your skin (heat, pain, etc)
32. Reaction Time GOAL - The goal of this experiment is to introduce students to the neurotransmission of messages while testing reaction time. This experiment demonstrates how gravity can react on the reaction time of the nervous system.
33. Procedure
34. Procedure
35. What are platelets? Section 37-2 Break in Capillary Wall Blood vessels injured. Clumping of Platelets Platelets clump at the site and release thromboplastin. Thromboplastin converts prothrombin into thrombin.. Clot Forms Thrombin converts fibrinogen into fibrin, which causes a clot. The clot prevents further loss of blood..