1 3 intro to the circulatory system
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1 3 intro to the circulatory system






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    1 3 intro to the circulatory system 1 3 intro to the circulatory system Presentation Transcript

    • DO NOW Describe how the excretory system works with the digestive system to help your body maintain homeostasis.
    • Objective:What are thefunctions andthe organs ofthe circulatorysystem?
    • FUNCTIONS OF THE CIRCULATORY SYSTEM1. Transportation of needed molecules  Oxygen  Nutrients  Other substances1. Removes waste from cells  Carbon dioxide  Other metabolic wastes Predict why we need a specialized system that helps cells transport nutrients and wastes.  Millions of cells are not in in contact with external environment
    • FUNCTIONS OF THE CIRCULATORY SYSTEM Millions of cells are not inin contact with externalenvironment Circulatory system bringsthese cells molecules s takenfrom external environmentLife Functions: Circulation;Transportation; Absorption
    • REGENTS REVIEW Which two activities in the chart best describe the process of transport?1. A and C2. B and C3. C and D4. A and D
    • REGENTS REVIEW Describe how the circulatory and digestive systems work together to maintain homeostasis.
    • IMAGINE… Think about driving to your house from New Jersey..
    • YOU CAN’T DRIVE WHEREVER YOU WANT! The circulatory system is the “roads” of our body: • A network of transportation to bring us the things we need • A network to take away the things we don’t need
    • WHAT ARE THE ORGANS THAT MAKE UP THE CIRCULATORY SYSTEM? The circulatory system is made of:  Heart  Blood Vessels (ex: arteries, veins, capillaries)  Blood (blood is considered a tissue – why?)
    • THE HEART Structure:  Size of a clenched fist  Made of almost all muscle 4 CHAMBERS of the heart  Upper 2 chambers receive blood from the body – ATRIA  Lower 2 chambers pump blood to body – VENTRICLES
    • THE HEART Septum - Wall separates two sides of the heart  Right side has blood without oxygen in it  Left side has blood with oxygen in it  Don’t want to mix blood  Predict where blood without oxygen would be pumped to. Blood with oxygen?
    • THE HEART Function: Transports blood that contains nutrients around the body; think of it as the motor of your body  Starts pumping (or contracting) before you are born  Stops when you die Contracts on average 72 times a minute
    • REGENTS REVIEW In the diagram of the human heart, which structures are most closely associated with the transport of deoxygenated blood?1. A, B, and C2. B, F , and I3. C, D, and E4. D, H, and I
    • BLOOD FLOW THROUGH THE BODY1 . It all starts in the right atrium  Blood returns to the heart from the body and goes to the right atrium
    • BLOOD FLOW THROUGH THE BODY2. When the right atrium fills up, the blood moves to right ventricle *Valves separate the ventricles from the atria
    • BLOOD FLOW THROUGH THE BODY3. When the right ventricle contracts blood goes to the lungs (getsOxygen) *Valves separate the ventricles from the atria
    • BLOOD FLOW THROUGH THE BODY4. Blood returns from the lungs to the left atrium with oxygen
    • BLOOD FLOW THROUGH THE BODY5. After the left atrium fills up, the blood enters the left ventricle *Valves separate the ventricles from the atria
    • BLOOD FLOW THROUGH THE BODY6. The left ventricle contracts and sends oxygenated blood to thebody *Valves separate the ventricles from the atria
    • REGENTS REVIEW QUESTIONS The diagram represents the pathway of the blood throughout the body. Which structure pumps oxygenated blood throughout the body?1. structure 12. structure 83. structure 94. structure 10
    • FLOW OF BLOOD1. Right atrium2. Right Ventricle3. Lungs4. Left atrium5. Left Ventricle6. Body
    • T YPES OF CIRCULATION Pulmonary Circulation  Blood from right side of heart goes to lungs to get oxygen  Oxygen taken in from lungs, C02 given to lungs Systemic Circulation  Left side of the heart pumps blood with oxygen to rest of body
    • REGENTS REVIEW QUESTIONS Identify the part of the cell that mimics the function of the circulatory system.1. Cell membrane2. Cytoplasm3. Nucleus4. Mitochondrion
    • REGENTS REVIEW QUESTIONS The diagrams show various organ systems. Cardiovascular diseases interfere most directly with the normal functioning of1. system E2. system G3. system C4. system D
    • REGENTS REVIEW The diagram represents several major circulatory pathways in the human body. Which sequence represents the normal blood flow in circulation to the lungs?1. 2 → 5 → 7 → 42. 4 → 8 → 1 → 63. 1 → 6 → 2 → 54. 5 → 7 → 3 → 8